Well, I finally beat Seth using Zangief while spamming his 3P move. I don't think I'll ever touch arcade mode again besides unlocking rest of the characters on easiest difficulty.
To be honest, right now I feel the game is vastly over praised. Sure, the game can be fun when playing against friends and the netcode is better than most fighters, but almost everything else in the game is very poor:
-Singleplayer is a joke. AI is either way too easy, or so freaking hard you have to start using exploits to stand a chance. It doesn't help you at all to fight well against human players.
-Besides arcade mode, you only have the challenges as a singleplayer options, which have extremely limited appeal.
-The game does nothing to help newbies learn the game. The only "learning" component part of the game are the trials, which teaches no gameplay elements besides combos which are stupidly difficult to pull off (and has no usage unless you've a very high level player).
-The online portion of the game is too limited as well. Only 1vs1 lobbies, no spectactor option. The arcade/matchmaking is a rather stupid addition, does anyone seriously enjoy randomly switching between the AI and human players?
-DLC ripoffs doesn't exactly make the game more appealing.
-The narrator and main menu music... is driving me fucking nuts. I'm warning you all, Capcom added this to the game because they hate gamers and they want us all to go mad. In 2 weeks the entire gaming population will take suicide because they can't get that song out of their heads, and they keep hearing the narrator in their nightmares.