This game is incredible. I was the same way in the beginning and then I started figuring out how to work the ground game. I've never been big on submissions, but ground and pound is where I do work. I was playing in my dormroom the other day and I was Frank Mir and my roommate was Brock Lesnar and I ended up getting him in a full mount in 25ish seconds and knocked him out.
Ground game is where its at. When they get you in a submission, I just tap all 4 colored buttons at the same time as fast as I can.
A win next week and all is forgotten.