How did France retake the Angevin territories?

How did France retake the Angevin territories?
First they were actually larger than France and wealthier and second, they had support from the HRE.
What gives?

I dunno Satan, maybe you helped them?

I'm not English

John was just that incompetent

France is just that badass, doesn't matter what your american education taught you.

John's accession to the throne
Following the news of Richard's death in 1199, John attempted to seize the Angevin treasury at Chinon in order to impose his control of the Angevin government.[97] Angevin custom, however, gave John's nephew, Duke Arthur, son of Geoffrey of Brittany, a stronger claim on Richard's throne, and the nobles of Anjou, Maine, and Touraine declared in favour of Arthur on 18 April 1199.[98] Philip II of France had taken Évreux and the Norman Vexin,[99] and a Breton army had seized Angers by this point. Le Mans refused to declare allegiance to John, so he ran to Normandy, where he was invested as duke in Rouen on 25 April. He returned to Le Mans with an army where he punished its citizens and then left for England. England had declared its support for John thanks to William Marshal and Archbishop Hubert Walter of Canterbury's support.[100] He was crowned on 27 May in Westminster Abbey.

Due to his mother's support, Aquitaine and Poitou supported John and only Anjou, Maine, Touraine, and Brittany remained disputed. In May, Aimeri, Viscount of Thouars, who was chosen by John to be his seneschal in Anjou, attacked Tours in order to capture Arthur of Brittany.[101] Aimeri failed, and John was forced to return to the continent in order to secure his rule, through a truce with Philip II, after Philip had launched attacks on Normandy.[102] Philip was forced into the truce due to John's support from fifteen French counts and support from counts in the Lower Rhine, such as with Count Baldwin of Flanders, who he met in August 1199 in Rouen, and Baldwin did John homage.[102][103] From a position of strength, John was able to go on the offensive, and he won William des Roches, Arthur's candidate for the Angevin seneschal, to his cause following an incident with Philip.

William des Roches also brought Duke Arthur and his mother, Constance, as prisoners to Le Mans on 22 September 1199, and the succession appeared to have been secured in favour of John.[103]

Despite the escape of Arthur and Constance with Aimeri of Thouars to Philip II, and many of Richard's previous allies in France, including the counts of Flanders, Blois, and Perche, leaving for the Holy Land,[103] John was able to make peace with Philip that secured his accession to his brother's throne.[105] John met with Philip and signed the Treaty of Le Goulet in May 1200, where Philip accepted John's succession to the Angevin Empire, and Arthur became his vassal, but John was forced to break his German alliances, accept Philip's gains in Normandy, and cede lands in Auvergne and Berry.[105][106] John was also to accept Philip as his suzerain overlord and pay Philip 20,000 marks.[105] As W. L. Warren notes, this Treaty began the practical dominance of the French king over France, and the ruler of the Angevin Empire was no longer the dominating noble in France.[107] In June 1200, John visited Anjou, Maine, and Touraine, taking hostages from those he distrusted, and visiting Aquitaine, where he received homage from his mother's vassals, returning to Poitiers in August.

Following the annulment of John's first marriage to Isabelle of Gloucester, John married Isabella, the daughter and heiress of Count Aymer of Angoulême, on 24 August 1200.[109] Angoulême had considerable strategic significance, and the marriage made "very good political sense," according to Warren.[109] However, Isabella had been betrothed to Hugh of Lusignan, and John's treatment of Hugh following the marriage, including the seizure of La Marche, led Hugh to appeal to Philip II.[110] Philip summoned John to his court, and John's refusal resulted in the confiscation of John's continental possessions excluding Normandy in April 1202 and Philip accepting Arthur's homage for the lands in July.[110] Philip went on to invade Normandy as far as Arques in May, taking a number of castles.[99][111]

John, following a message from his mother, Eleanor, rushed from Le Mans to Mirebeau, attacking the town on 1 August 1202, with William des Roches.[112] William promised to direct the attack on condition he was consulted on the fate of Arthur,[112] and successfully captured the town along with over 200 knights, including three Lusignans.[111] John also captured Arthur, but antagonised William,[113] failing to consult him on the future of Arthur, and causing him to leave John along with Aimeri of Thouars and siege Angers.[114] Under the control of Hubert de Burgh in Falaise, Arthur disappeared and John was seen as responsible for his murder.

The Angevin Empire was under attack in all areas, with the following year, 1203, being described as that "of shame" by Warren.[116] In December 1203, John left Normandy never to return, and on 24 June 1204, Normandy capitulated with the surrender of Rouen.[99] Tours, Chinon, and Loches had fallen by 1205.[115]

On the night of 31 March 1204, John's mother, Eleanor of Aquitaine, died, causing a rush of "most of Poitou...to do homage to the king of France."[117] King Alfonso of Castile invaded Gascony, using the claim of his wife, John's sister Eleanor.[118] When John to the continent in June 1206, only the resistance led by Hélie de Malemort, Archbishop of Bordeaux had prevented Alfonso's success.[117] By the end of John's expedition on 26 October 1206, most of Aquitaine was secure.[119] A truce was made between John and Philip to last for two years.[119] The Angevin Empire had been reduced to England, Gascony, Ireland, and parts of Poitou, and John would not return to his continental possessions for eight years.

By the end of 1212, Philip II was preparing an invasion of England.[121] Philip aimed to crown his son, Louis, king of England, and at a council at Soissons in April 1213, he drafted a possible relationship between the future France and England.[121] On 30 May, William Longespée, Earl of Salisbury, succeeding in crushing the French invasion fleet in the Battle of Damme and preventing French invasion.[120] In February 1214, John landed in La Rochelle after creating alliances headed by the Holy Roman Emperor, Otto.[122] The aim was for the Earl of Salisbury and John's German allies to attack Philip from the north, whilst John attacked from the south.[123]

By June 1214, John had the support of the houses of Lusignan, Mauléon, and Thouars,[124] but when John advanced into Anjou, capturing Angers on 17 June, the desertion of his Poitevin allies forced a retreat back to La Rochelle.[123] On 27 July, John's German allies lost the Battle of Bouvines, with many prisoners taken, including the Earl of Salisbury.[125] On 18 September, John and Philip agreed to a truce that would last until Easter 1220.[124][126] In October 1214, John returned to England.[