If that’s really true then you would climb. It’s pretty simple, if you play better than the enemy team and your teammates then you will be winning more games than you will be losing. Will you still lose? Of course, but you’ll win more because of your above average play.
Now if you’re playing around the same as your teammates/the enemy you will stay in your rank. So if your staying in your rank then that is where you belong. Tough pill to swallow at first, I know. I used to think i was better than I really was but after playing for quite a while I can see that I’m no better than them. Especially after i played the dps role extensively.
Also I’d like to quote a statement from an overwatch developer. I think it’s quite fitting for this type of post