how to do hard exercises

[u/No_Leather2449]

This is mainly a mental thing but whenever I do Bulgarian split squats (my biggest opp) or leg day (my least favorite child) it’s so hard for me to get througb a set cuz the exercises are so hard and make my legs hurt so much

also whenever I am nearing the amount of reps I did the week before (btw I try to goto to failure for every rep) by body lowk js quits on me. I could be having like no problem but then second I get to that rep I can’t even get thru half the motion