Play some free for all for a few days, if you’re getting stomped by diamond+ players, then you don’t belong there.
Eh FFA is a different beast and not a good indicator of where you belong on the ladder.
Why not? It showcases pure mechanical skill. No blaming throwers, trolls, or other teammates for your rank.
Because pure mechanical skill is not all there is to this game. I have a friend who pretty easily hit master in comp ffa yet can’t break out of plat in comp. Meanwhile I had to grind hard to get master in comp ffa even though I sit in master on the ladder easily.
MMR cannot be a global average or even weighted average of your SR, which is what you are essentially suggesting.
If this were true, then the statement made that MMR and SR closely follow each other could never be true, ever.
Likewise we also know for a fact that MMR is used by the match maker to create matches, Blizzard have said this much to us…
So now remember back to the last time you moved from one rank to another, there would have been a few games as you transitioned where it was mixed lower and higher ranks, but after two or three wins you are in the clear and now playing with the higher rank.
If MMR was a global average, this behaviour would never occur.
Transitions between ranks would take a LONG time, weeks or even months depending on how long you’ve played for.
One win is a drop in the ocean of most experienced players total matches, my main have something like 3000+ comp matches.
So with all of that in mind, in my opinion, it cannot be a global average.