Aggregated ELO?
I don’t think such a thing exists.
Someone mocking someone because of ratings is someone who does not have a life and one should not listen to such people.
If someone mocks you because of your rating, it's unlikely that that has actually something to do with you. They are probably just throwing an online tantrum because they are grounded for not doing their chores or homework. Children's behaviourisms are not based on logic or reason.
You can report people who insult you on chess.com; swearing isn't allowed on chess.com and neither is verbal abuse, or trolling. Mocking you for your rating is at least trolling. You can just report them and move on: https://support.chess.com/article/209-how-do-i-report-someone
Still very new here - barely thru the first two lesson collections. Anyway, someone mocked me for having a 400 elo but when I checked my stats I could not find an aggregated elo number. And the only 400s I have are bullet & the varieties I have not and likely will not play (the 960 games).
Anyway, I’m not good enough to where I was insulted - These last 3 weeks are my return to frequent / care about it chess after about two decades.