right now, sym is legit bastion and old sym levels of niche because of the tp cd nerf that took away the ability to adapt tp positioning and usage to the situation and took away sym’s only method of engaging the enemy on her own (a luxury that every other dps hero has and take for granted).
sombras have been pretty vocal from what I’ve seen. but for soldier idk, why don’t you go ask the soldier mains ._. generally speaking soldier’s individual balance hasn’t been so red flag terrible compared to the usual suspects over the history of ow and neither has he had a large stigma around them to give rise to them being particularly vocal. and tbh, I think people don’t make much noise because they consider him to be THE generalist dps of the game and inherently doesn’t have anything to particularly stand out for.