Welcome to conspiracy land. It’s best to just identify, report (literally and figuratively), and move on. You can’t convince someone that a conspiracy doesn’t exist because YOU then become an “actor” in the conspiracy. Just look at how many time Kaa and I (and probably you too) have been accused of being Blizzard employees. Kaa and I have been accused of being the SAME Blizzard employee.
We’re better off convincing people that hear these conspiracies but aren’t certain of them yet. The only way to do that, afaik, is to present the truth not as “what I know to be true” but as a reasonable alternative that just makes more sense. Don’t tell them they’re stupid. Only really super smart people think they’re stupid.
Take that kitten person, who thinks they get put in hard matches to bring their SR down to where it belongs. We already know the method by which SR is moved to match MMR, it’s the same as with decay. There’s no need to attempt to force a loss as that’s not guaranteed and it’s unnecessary.
No matter what the goal, directly intervening in matches to make them imbalanced to an extent that the match can be considered “forced” is the most inefficient way of doing things. Even if you accept that they wanted to “force” matches in some way, that’s not how they’d do it.
Some people will never understand that it’s harder to fake a moon landing than it is to just send some poor schmuck to the moon. The interminglings of millions of people playing OW is complicated and has strange results sometimes. Some people just can’t intellectually or emotionally handle that.