Is there a way I can get better?

I'm a vita player, my rank is rookie, and my ranked record is literally 20-110. So I'm looking of help.

Here's the thing. I don't want to get "ULTIMATE GOD OF CAUSING INSANITY ONLINE" good. I just want to get about good enough to beat 5th lords regularly.

Here's my info.

Current teams: Phoenix Wright Dante Captain America
Frank West Viewtiful Joe Zero
Iron Fist Chun-Li Taskmaster

I WILL NOT use: Hsien-ko M.O.D.O.K Jill Storm Chris

I want to keep: P.Wright Dante Viewtiful Joe (Zero maybe) Iron Fist Taskmaster

Keep 2 easy character strategies minimal, no 3 easy characters on the same team.