I mean no offense to anyone on these forums, but if you're primarily playing online, then you aren't really playing at all.
If I only played online I would of quit it by now too. Online is just nonsense. You can't even walk forward and block projectiles on reaction to the starting animation online.... you just have to stay full screen, jump like a maniac, or dash block the opponent's zoning(which becomes extremely predictable AND some characters can't even reliably do it like GL).
Also, some characters are completely unviable online because they NEED the ability to walk forward and react to things in footsies range, and some strategies with characters are extremely strong online.
In general if you're playing online only your going to get sick of the game simply because of the lack of options due to input delay, no question about it.
Offline communities for this game are THRIVING because the game is so solid. Online is a muddy mess and just promotes bad habits.