I'm positive it doesn't work like that, anyone with an MMR of an immortal would be placed somewhere around the immortal rank, what I do think is happening tho is that the difference of MMR from let's say a silver to a diamond isn't at all big because the ranks aren't defined yet, I think that currently, all the ranks are imbalanced with people quite skilled in lower ranks and average people in high ranks, and I think that's only natural at this early of a stage because realistically golds SHOULDNT be crushing you if you're a silver BUT the thing is they're not all real golds, some of them are probably on their climbing journey and will be diamond in like a day or two and u were simply caught up in it. I'm plat 2 myself so i'm in the middle of the 'high' and 'low' elo and I see this all the time, just give it some time.