Hi aunty g, you have to give people more than 2 hours to respond.
Could you please give more detail? Is the paint rubbing off dry, or is it wet or sticky? What did you add to the paint? This seems an odd problem for acrylics.
Did you unknowingly mix some of your oil materials in with your acrylics?

My first thought was about the primer. Was it a primer for oils or acrylics. If for oils, that would be the problem.

Another thought was that the paint wasn’t cured. It can take up to several weeks for the paint to properly cure.

I’ve never put acrylic paint or gesso on top of oil (primer) paint or anything oil based and so have never had that problem. Just ask my attic. Oil based paint will stick to acrylic, just not the other way around, is the rule I’ve followed.

I have it happened to me . The reasons for mine had been.
A , Thinned the wash with water too thin broke the polymer bond I was told.
B, Oily residue on painting. (eating lunch had to move painting wife needed in closet easel in front of it) the next layer of paint broke up in the pattern of my fingers .
C,Using an interactive paint 2 days later scumbling over top pulled up some base paint.

I noticed these when doing a rough scumbling over a dried layer.

Eric

I’ve never put acrylic paint or gesso on top of oil (primer) paint or anything oil based and so have never had that problem. Just ask my attic. Oil based paint will stick to acrylic, just not the other way around, is the rule I’ve followed.

I don’t use oil based paint now and I don’t care what you think. But since that rule has worked for me for 50 years or so, I’ll stay with it, if that’s ok with you. I’m sure that paint compounds have changed, so all the nitpickers can have a ball, while I just sit back and wait for all the oil paint in the world since about 1950 to fall off the acrylic gesso, technically, metaphorically speaking.