Ahh again don't worry too much Tuff, I mean you are probably playing on ranked right? even I hate playing on that crapstain of a mode (I've quit pretty much), with everyone using the cheapest, most boringest tactics possible to win, more or less resulting in it feeling like you're playing the exact same Ryu or Guile or whoever over and over and over.
The most frustrating thing, like the tactics you mentioned is, that you know it's really dumb, really lame, lazy tactics that you should be able to beat, but they work on you! it happens to me too, yesterday in fact a bunch of times.
One main reason I think that does happen, is it limits your options. If someone is doing, for example repetitive effective zoning constantly on you, you probably have only one thing you can do, and it forces your hand. Even if you get past it, they will jump/teleport to the other side of the screen and continue to do it over and over, so you end up being forced to play repetitively to beat them, and any deviation from that, results in a fireball to the face.
Over the years that's been a major annoyance to me, as I'm not a fan of playing repetitively and don't like to play cheap (in fact I kind of suck at playing cheap, haha) I know I should probably just suck it up and just beat them however I have to, but when it's repetitive like that I just get bored and don't really want to play their game, lol.
One thing you can do for turtle players, is just, force them out of their corner, they started this BS, so just stay in your corner with a life lead and jump over their spam and win by time if you have to if they really just won't give up.
It may feel cheap, but again, they started it and made the fight this way, and the chances are, they do it so much, they suck at close range, so when they eventually attack, beat the shit out of them and get an even higher life lead.