for one thing, nemesis has REALLY safe blockstrings, especially for a heavy character. tired of dem blockstrings? get into the habit of throwing as a punish rather than LLLLMHS. the standard Nemesis blockstring is LMH into clothesline L. This move LOOKS super sunsafe, but its actually one of his safest moves, as its only like -3 or -4 on block. No jab in the game will catch it.
however, a throw will. so throw more, and learn how to maximize your damage off of them.
as for rushing him down, nemesis has armor, so the more hitboxes moving around, the better. Fight him like you fight the Hulk, IE: dont press buttons unless you KNOW that nemesis isn’t pressing H. once you do get in, you want to lock him down like any other big character. go instant overheads, crossups, etc.
If Nemesis is playing his zoning game (we all know how surprisingly good he is a that) you either need to negate it with your assists if you’re using ammy or felicia, or you need to out zone him. I know you said you’re not good at zoning, but really with characters like Doom, the best thing to do is outzone Nemesis. then he has to go on the defensive at full screen, and traverse your ma(i)ze of projectiles. Hawkeye is a super difficult matchup for nemesis, just sayin’.
both his hypers are unsafe on block as all fuck. you can throw him in the middle of his Rush hyper. DO NOT ATTACK THOUGH. ONLY THROW.
in regards to that Akuma assist, use Ammy’s elements hyper to punish that if he/she gets predictable. Akuma goes down like a bitch.
and for felicia… kitty helper hyper. that will fuck up ANYONE’S day, but for big characters, its a real problem.
so yeah thats all the advice I can give. oh, one more thing: and if you get hit and set up for a reset… PRAY