I said ruin.
Effect yes.
But ruin, not necessarily.
If you have one or two people peeling, the effect will be felt but the rest of your team should be holding it together.
But Mercy cannot return people to the fight fast enough or keep them out there to prevent too many from having to peel and therefore it can absolutely ruin/destroy the pacing of the fights you are in.
You have to remember and take into consideration that high ranks may not always notice certain effects of Mercy being bad compared to low ranks and it comes down to the fact that;
Lower ranks are more likely to take careless bits of damage compared to higher ranks. If you are a good Mercy player, you are able to work with this but for a far greater effort when any other support choice has better capabilities at dealing with your team taking careless damage, suddenly it becomes incredibly clear there is an issue. If Mercy is an entry level hero, should she not be able to have decent capabilities to sustain a team at that level. Should it not be a space in which she excels incredibly well and likely better than most of the other heroes in the roster?
Eg. Why put into 200% effort in to keep a team sustained on Mercy when I can sustain a team on Moira at about 50% effort?
And that doesn’t just come down to situations, when it is every situation for me.
Why put out 20K heals on Mercy at 200% effort, when I can 20K heals on Moira at 50% effort.
The only reason I keep playing Mercy is because my game sense and skills are overall better on her, my aim for shooting is better. I am better at securing situations with Mercy, but the overall effort I have to put in is much higher. At the end of the day I like playing Mercy’s base kit and I like her aesthetically. I don’t mind having to put in that effort but it feels wrong to put in so much effort and be given very minimal reward and have various aspects of Mercy’s kit dumb her down while also still giving her very little.
She feels like a very imbalanced hero in the sense of the power distributions on her own kit. She may look like a balanced hero stat wise and in the game, but playing her is like a whole different experience.