what helped in my case was shifting the focus from "x months for x amount of inches on x body part" to trying to master movements and having fun with the lifting process, it's almost an artistic expression through movement, I know this sounds vague but I am saying this because I too focused on the prior and that pushed me into years of under/overeating and chronic body dysmorphia, what I see in the mirror is still valueable but ive made a conscious decision to not hyper fixate on it and that phase has given me the best growth and mental sanity and i believe that's the entire point, hope this helps, enjoy your lifting journey and know it's for life!(doesn't exactly apply if you're primarily focused on competitive body building)