Reposting case he didnt see
Orks are a difficult army to play, they are bad, but not unplayable. If you want to play a couple of models you can run kill team, which orks are pretty good at. Kill team is usually around 10-30 models of guys.
Generally, pick an army you like, and learn to play them. Being competitive with any army revolves around milking the codex for the biggest amount of cheese as possible, and all codexes can do that, just some easier.
If you ever want to play orks in a larger points number, like 500-1500, some key points are:
Footslogging ork boyz suck unless you run green tide formation, which is about 100 models. If you choose to run boyz, put them in a battlewagon, or give them some form of defense if they footslog, like a painboy for FNP or eavy armour for a 4+. Shootas are worse than sluggas in my opinion, but its up to you really. A slugga cost no points and come by default and gives the ork an extra attack and a 12" s4 ap6 shot hitting on 5's. A shoota cost 1 extra point and causes them to lose and attack and have 2 base, but grants you 2 s4 a6 18" shots hitting on 2s.
Tankbustas are amazing, a squad of 10 guys with s8 ap3 rokkits, regardless of the fact that hit on 5's is goat, with re rolling armour pens and getting an extra victory point if they score first blood. Bomb squigs are a 5 point rokkit thats ap4 and hits on a 2+, which pretty much guarantees a kill.
Mek guns are good, but hard to come buy. You can convert them out of leman russ barrels, 3rd party, or scratch built them out of plastic tubing and some plasticard
Warboss is a CC fucking monster, with the ability to dish our 6 s10 ap2 attacks on the charge is fucking delicious, however, he is suspectable to shooting. Either give him eavy armour or a 2+ mega armour save
90% of the forge world units for orks are the best, and you can easily convert them, depending on how skilled you are.
Check out 1d4chan.org/wiki/Warhammer_40,000/Tactics/Orks(7E)