Masters In Bronze-Gold Lobbies

My best randoms game yet (still kept the similar dmg to my previous record at just below 1.8k dmg) but with one more kill.

However, it is not about showing off, but rather pointing the obvious problem out.

While Octane and I did similar dmg and were at the similar skill level, our Lifeline was clearly not doing the work, and that's because he was new to the game (he even apologised for not doing good).

And to be fair, 50% of this lobby felt like they were on the same level as my lifeline; we did have a 3 stack masters, who were the champions that game, but luckily died off of a hot drop (otherwise, my assumption is that they would win again). 

I know I am not the best, I know I can't compare myself to anyone, but how suspicious was it that a 3 stack masters was in this specific lobby of such low to mid skill level?? Isn't it alarming that something off is going on? There is no way that 3 masters (with 3 of them having the 4k badge and 1 of them having the 20bomb badge) would be intentionally put in a lobby like this. The MM is truly at the worst state yet.