On your primary account? Oh dear...
https://support.chess.com/customer/portal/articles/1444776-can-i-have-multiple-accounts-
Now as to your question. Lots of folks suck at blitz (myself included). The time pressure gets to them, the kind of pattern recognition that good players have is absent, or they're just old. Also not everyone takes advantage of the legal tools available for correspondence play and that inflates the ratings of those who do.
Hello! On my primary account my blitz rating is around 1000, but in online chess it is 1600, and I have about 1400 in tactics trainer with 3000 solved puzzles. I just wondered how it is possible to suck so badly in blitz? When I look at other people's ratings, there are at least some correlation between their Online Chess and their blitz rating, but not on me. This feels very frustrating, as I feel the blitz rating is the one that matters the most