Yeah ok, but you are still missing the “why”. What would be the reason to keep anyone lower? It doesnt make sense. You mentioning some cod patent from activitision is not related to OW. Owerwatch was primarily created by Blizzard, I know both companies are together and some big decision could affect both companies together, true. But Overwatch is pay to win, they dont need to penalize anyone as you can buy only cometics, no ingame power.
Just look at players in your games lol. If you would be able to see the ranks, sometimes you are, you could see how games are pretty much balanced in term of SR/MMR. You can even see the damn number just before you go into match so both teams have almost exactly same average number.
Again, if you have any proof of hancipaning your games, record it and post it here, i am collecting evidence for it.