I’m going to the gym today from now on I’m going to the gym I need to be better than these women

Just be better than yourself.
You might end up losing yourself if you keep trying to compare yourself to them. It's like throwing yourself on a cliff with no end by choice.

Just breathe. Do it for yourself. Not for them. One step at a time. No need to be too in a hurry either.
One step. Then another. Then another.
And then realize you're becoming better than the you yesterday. And then again. And again.