It’s not specific to one hero, the collison in this game is awful. It’s bad for pve where people block attacks, block you in to die and where clipping can really stuff up your movement.
In PvP it’s beyond terrible especially in some areas or fights. Friendly collison should definitely always be off. It also often feels like collison is based on huge square boxes rather than actual models too.
I mean in the mission where you resort the big spider robot you can get stuck behind it, enemies run in to melee it and you sometimes can’t damage them through the robots legs. Not game breaking but effects quality of life considerably. I can see how it would effect team make up, you often don’t want to compete with other melee.