I'm in the same boat! While I just recently was able to improve my score considerably, it's taken forever. I've been doing lessons and going to live classes that focus on sections/question types that are reappearing when I review my wrong answers after each practice test and that has shown the most improvement. I would definitely recommend trying a similar approach and keep in mind quality over quantity. Part of my issue was I would burn myself out, beat myself up, or try learning too many different things at once to overcompensate for my score that ultimately hurt me more than it helped. Taking breaks and forcing yourself to stay positive will show improvement! You got this:)