If the matchmaking is doing its job, you shouldn’t be drastically better than anyone on your team or the enemy team.
So it’s very unlikely you’ll have “carry” moments and feel like you’re better than everyone else because you shouldn’t be (unless you’re a smurf)
Because sometimes you will get countered, or counter.
If, for example, you have no competent hitscans in your team, and you find a good pharmercy duo as your opponents, you going to be obliterated, even if you are on the same skill level.
Also, there are several other factors, like overall synergy (You might click perfectly with your other 5 teammates and get fully enabled), current mood (You might have fully tilted opponents who semi throw, or be tilted yourself) etc.
The matchmaker can’t calculate everything, sometimes you’re going to have games that you carry, or be the weakest on your team.
The problem is the matchmaker assumes you are that SR on every hero and every role, which outside of a few god tier professional players, nobody is the same SR on every hero and every role. They are better at some than others.
The problem becomes even more amplified if you get too many one trick or too many of the same role on your team.
Basically they built the matchmaker to assume everyone can play every hero and role at their rating when who actually uses the matchmaker is not that kind of player.
I don’t know how the matchmaker works but this one:
This one can be fixed very easily. They can make people who have over 70% with a hero, avoid teammates who main the same hero.
E.g. a dva main should avoid other Dva mains. That’s a very simple fix. It would might make the search queues a bit longer, but it’s worth. You would have the “3 mercy mains” in the same team problem solved.
The benefit of 2-2-2 comps is that you could have a subpar DPS-Healer-Tank.
But if your other DPS-Healer-Tank perform well, you can still win.
Or on a more micro level, if the one other player who shares the same role as you is slacking. You can carry their portion of what they should be contributing.
This introduces a different issue where someone who fills a hero that is seen as mandatory for the first few dozen games of a season is pigeonholed into only ever playing that hero until the stats are reset over the next season, even if they don’t actually like playing that hero, since the matchmaker assumes that that’s all you plan on playing.
This happened informally in Mercy meta. Someone would peek at your playtime, not bothering to get past your “this comp season” records, and lambast you for playing anything other than Mercy if you tried to play anything else, even if you only had a lot of playtime on Mercy in the first place because you filled in your placements, partially because of the perception that exists that states Mercy players are incompetent on everything else, but also because Mercy was a “have this hero on your team or you lose” character at the time.
This is Overwatch. Where everyone thinks they play the gave at a GM level and their teammates are braindead bronze players.
No player should feel absolutely useless. I shouldn’t feel like I have 0 impact. That doesn’t even mean carry moments. Match quality has been terrible for the past 2 seasons every other game feels like that.
The match maker does its job by making it so people aren’t better than others, (aside from smurfs) but because of the players, and poor matchmaking, every match either team will feel like no matter what they do they can’t win.