no, it would hurt the character. And you say you dont always have a ult ready, well they dont always have a turret ready after you blow it up. And if the problem is their team is communicating and playinjg classes to cover each other (I assume you mean a Rein covering a turret? or multiple turrets? because thats not bait for junkrat tire, hanzo dragons, dva nuke, pharah missiles, etc?) then your team should do the same no?
Turrets and Bastion are pug killers and nothing else. And yes, ive lost games to tors and bastions myself, plenty of them. Not NEARLT as many as I lost because of a good Mcree, a good Widow, a good Tracer, a good Hanzo, etc. And im not even saying those characters need a nerf (*cough*mcree*cough*).
Sometimes "git gud" is real, sometimes you do need to get better at the games, know routes to flank, get better at counter picking, etc. Just go back a few pages and alot of "turrets are OP blargh" posts are acompanied by "I just started playing this and I notice...". Its Bastion week 1 all over again until people learned to deal with him.