Yeah, same here. I really tried to get into Skullgirls because I liked the art style and the pacing of that game, but the mechanics are so beyond me. It even has a very in-depth tutorial which I played through for hours but I still ended up mashing buttons because holy shit how am I supposed to remember a sequence of 50 buttons to push with exact timing to pull off that one combo?
its the same for me with any fighting game. Im great at them until I play online. I try to limit my time with fighting games, If I do play them, I either play alone or with my brothers. They seem to be the only ones I can actually beat.