Hi everyone. So I do bjj, but my flexibility is really bad. Last summer I made it a goal to work toward a full butterfly stretch and full lotus for my hip mobility. I started sitting cross legged around the house and holding a butterfly stretch for 30 minutes each day. I also began deadlifting and squatting (butt to floor) 3 times per week to improve strength. I stopped lifting in the early winter. For months I added weights to my butterfly stretch and did loaded progressive stretching 3 days per week, followed by finishing up the 30 minutes each day. Then I began alternating loaded stretching with pnf stretching. I began stretching my piriformis for 15 minutes each side every day. All while stretching during bjj. In the new year i started the GB stretch series, thinking maybe I need to loosen the system as a whole. On my off days i do a full hip/leg limber. I've made very small but visible gains with the stretch series, but my butterfly/cross legged poses are still just as bad as the day I started Last summer. I can bring my feet into my groin but my knees are by my chest and my lower back is rounded. Sitting cross legged my knees are by my upper abs and I feel a stretch/discomfort in my outer hips. Even now I'm lying down in a supine cross legged pose, with my knees high in the sky. I dont think i have a hip impingement, as my glutes are flexible and i can bring my knees up into my chest with no issues. With bent legs i can make my knees touch the floor by my shoulders lying down. I'm at a total loss. Any help would be much appreciated!
TLDR: I've consistently (5-7) days per week put in work toward a full butterfly stretch and sitting cross legged with my knees comfortably on the ground. I've made zero gains in 10 months.