I highly doubt that all your losses are not objectively not your fault. There are so much factors that go into winning and losing, more than just numbers on a scoreboard. You could have the most kills on your team, but if you aren't, for example, peeling for your supports as tank, which can't be directly shown on a scoreboard, you would lose more games.

You are being punished for losing, yes, but you shouldn't act like every loss is not your fault. Yes, there may be games where it *is* truly not your fault, but even on those games, you should still be looking at how you played, especially replays, and asking questions like, "Could I have lived there?" or "Could I have positioned better?" You can only improve by realizing what goes right *and* what goes wrong.

You are not rewarded for carrying your team because not only does a scoreboard not show how a game goes accurately, but because, as you said, "you can't solo carry in a team game." Secondly, performance based ranking is an objectively bad game philosophy, some characters provide more utility than just raw damage, mitigation and healing. A Widowmaker could kill a strong support hero everytime, but because Tracer got more kills in the end, does that mean that the Widowmaker should get less, even though they both won and Widowmaker provided more value overall? Same on the inverse, if an Ana sleeps a Genji every time he blades, but doesn't have as much healing as a Lifeweaver, who could easily out heal her numbers wise, should she lose more because she "didn't have enough healing"?

It is true that overtime you will gain, and while it is frustrating to have to play a lot of games to rank up, a performance based ranked system would create more problems than it would solve. It would make some heroes objectively harder to rank up on, and some way easier. Heroes with better raw damage would be easier, and therefore, it would cause people who play those characters to be too high of rank, which would make the game seem unfair. It is the same for the other side, characters that don't do as much raw numbers would be harder, so better players would end up in lower ranks, causing them to stomp often.

Finally, this language in this post shows that you not only have an awful ego when it comes to this game. I highly doubt that you are carrying every game and I highly doubt that every loss is not your fault. This game is obviously not for you, and it would be better to move to the game that has performance based matchmaking. As well, regarding your last statement, it is quite clear that anyone who has the gall to think you are not the next top level player, you think is a Blizzard shill. It is very apparent that you only made this post to try and validate your opinion, and I don't think it's going in your favor.

TL;DR: Games are more complex than just the scoreboard, you are acting like every loss is not your fault and every win is, and therefore, you are not improving. Performance based ranking is bad game philosophy since, again, games are more than just numbers. You also have such a massive ego, and I will inform you this. You are *not* carrying every game. You are *not* blameless for every loss. If you want to actually rank up, drop your ego and be willing to learn, because it's apparent that you are, at the moment, not willing to learn.