Accountability

I advise putting the responsibility of your success in BJJ on yourself. If it is something that you truly want to be good at, the first evaluation should be whether you are doing enough. This is more crucial for competitors, but the principles apply to casual practitioners as well.
Go to Class
Do the Work
Know the rules
Study
Ask Questions
Become the Captain of the team effort for your success in Jiu-Jitsu, and I believe that you will see incredible results.