I have the same problem. I play all of the supports except Ana and most of the tanks. I just don’t really like the playstyle of any of the offensive heroes.
I have anxiety and get really panicy and stressed playing most of the dps toons. I hate it, though, cuz I feel like I could be more effective in comp if I had at least one dps I felt good about playing. I’m trying to pick up ol’ Fisty, though. He makes me feel powerful as fuck, so I think I could start to get used to him. xD