If you were to give gear to boost his weaknesses, Attikus would perform very poorly. Most folks simply boost what he’s already good at so he can actually do anything. I do well with him, not because he’s incredibly good but because I have a crap ton of matches under my belt. (Why do you assume I do bad with him?)
It’s like Whiskey Foxtrot, I’ve seen plenty of people straight up carry with him but that doesn’t make him a good character. There’s characters that do his job a lot better. You can’t just tell people to “Learn to play” if a character is fundamentally flawed. There is a time and place for players to adjust and another for when characters themselves need adjusting.
TL;DR: If what you were saying was true, Gearbox wouldn’t be working on him right now.