Wow, Veeky Forums is bad at magic.
Sol ring is fine. It's literally a dollar, one comes in every single constructed deck, and it doesn't inherently do anything on its own.
Serra Ascendant is kind of a kick in the nuts, but there are much more important things to worry about. One 6/6 flier early isn't worth banning one of the few useful white cards, just use removal like you should be using anyways.
Felidar Sovereign is also fair. It assumes you at least have your starting life total, and it's more of a late-game wincon for Esper than a real workhorse of any other deck. I run one in my Ayli and I think I've only won with it once, considering tutoring it into my yard with buried alive and bringing 2 things back with victimize is pretty much my bread and butter. Most of the time it hits the field, gets nuked, and that's that.
Top is also fine, tell your stupid ass friends to fuck off, or give them a 30 second timer to look at their cards. I run top in two separate decks and not a single person has ever complained about the way I use it.
Cyclonic Rift is boarderline, but again, it's 7 mana AND requires a boardstate to be useful. Sure, it sucks and makes people feel bad, but it doesn't win the game on its own. I can do a lot of shitty things for 7 mana.
Sorin is kind of meh as well, but he's no worse than the infinitely more splashable Tree of Perdition that comes with a 2 piece instant-win, so I think it's small potatoes.
Now, what do I think is oppressive as fuck? Stax. Stax is the ultimate feelbad deck for casuals. I don't really want to advocate anything getting banned, but I can see people being more mad about stax than some infinite mana combo into a full table mill.
Certain cards should also be banned only as commander. Black Braids is a fine card on its own, as a commander it's far too oppressive. Same goes for Nekusar, slap something with infect on him, and you're almost gifted a win.