I’ll give you one that most probably don’t think about:

Moira

What’s the issue? everything about this hero is “free” with next to zero skill expression

Primary - tap and shake mouse, everybody in front of you is now getting heals

Secondary - hit box so generous that it’s damn near impossible to miss your target

Orb - toss in a general direction and people in front of you are getting heals or they’re taking damage. Even redirects itself. Goes through barriers, wide radius

Fade - best get out of jail for free card in game. And now they made it easier to do so by allowing you to jump in middle of it

Coalescence - outside of zarya, completely unmitigatable, piercing damage or heals, once again with a generous hit box making it damn near impossible to miss targets, also easier to use since they added ability to fade in middle of it

So why is it problematic? Because it’s just raw heals and damage which can only get you so far. It lacks utility to really make her a good candidate for a support (when was last time she was “good”). Her skill expression is so damn non-existent that she has a cap on how much value she can provide. Likewise it’s so damn low that she’s a complete nuisance for lower tiers. You can’t actually give her what she needs, because on a kit that ridiculously easy to use, you would just make her busted for many players and nobody would actually enjoy playing against that (lifeweaver suffers from some of the same)