What exactly annoyed you about SF4?
Lots and lots of things, and FADC and 1f links aren't even close to the top. Here is a quick summary putting a lot of stuff together in 3 sections.
-safe vortex's like Ibuki or Viper(until USF4 at least). They don't put themselves at risk to 50/50 you like Mika.
-Tons of and tons of safe on block specials(some with tons of push back) that have a lot of range like hazanshu, blanka ball, sumo headbutt, scissor kick, etc.
-characters that had many wake up options in a addition to back dash(Bison, Viper, Akuma, Fuerte, etc.)
I could think of more but I think you get the idea. SFV doesn't let player go ham or throw out moves randomly safely. I use to play Seth and Yun and would just go crazy a lot because their move set allowed me to.
8f of lag, jab anti air, or corner grab loops don't really bother me much(ok, maybe jab anti air a bit). At least no where near as badly as the shit I had to put up with in USF4 like Fuerte running back and forth and when you had a knockdown you had to guess between EX Q Bomb, EX run, or EX legs. And if he did EX legs and you messed up the punish you're getting Ultra'd if he had that. I still love the game and think it's a more entertaining game to watch than SFV. But it pissed me off way more than SFV ever has.