Not generally a big deal. He can take the turret, but he can't keep it down unlike the others. And given traditional turret placement, you usually have plenty of time to get out of the way of Hanzo's ult when he fires it, since you're generally not near the center of the action. He's good for clearing multi-turret nests, though.
For sure. I'm trash aiming and pretty terrible even on against console players. I've been rocking very forgiving characters (Pharah, Symmetra, Lucio and Mercy). The game is designed really well for multiple skill levels.
Try Junkrat. I routinely do my best play with him, using the controller, on PC. He's not exactly about precision shooting anyway
Oh, and while I'm talking about Junks, I can't stand the number of Junkrat players I see playing him on defense that don't understand how to use him. You aren't supposed to be sneaking around flanking and hunting. You're supposed to be dead center, using bombs and mines and traps to move the platform/secure the zone. You are capable of holding off an entire team by yourself defensively once you learn how to do it well. You can break your foot off in nearly any single player's ass who gets in your face, and you can make entire passageways unliveable. Quit hiding, come out and seize your glory, fellow Junkrats!