I fmq for many years without any sliding aids so I'm thinking something else is going on. Do you have a friend who can watch you and offer suggestions? Are you supporting the weight of the quilt? Do you starch the top and backing so it's nearly as stiff as paper?
Are you guiding,not pushing or pulling the quilt? Is it basted properly?
Are you using the right needle?
I think you should take a break, watch a few utube videos and and then relax take it slow . It does take practice. So start with a small practice piece.
Good luck
Cindy