People gotta get the practice in at some point.
Arcade is a terrible place to practice anything, and going to Widow customs is also terrible cuz there’s always that one GM player that goes in to just ruin everyone’s day.
I know it sucks to have a crappy player on your team but to be real QP is the best way to practice any hero you’re not so great at.
I’m a terrible Reinhardt, and I can’t get decent practice in the arcade because either the game mode just doesn’t work out or the arcade matchmaking makes VERY unbalanced teams. So I gotta practice him in QP, it might result in a few losses, but I gotta get good with him somehow.