I started maining jg this season and the previous one because riot refuses to nerf the role. I already told you why you aren't the highest level on your team because jg camps are giving way less exp due to the afk fid. You realize camps are based on levels and you can get a 50% exp penalty for a level difference of 5? Also you must be super low elo because nobody plays fid jungle in anything but silver.
Literally any non-jungle main can pick up the role and instantly boost their win rate, it is brain dead easy to carry with.
I already told you to look in my match history and show me the game with the under leveled jungler, there isn't a single one. There isn't a single high elo player who doesn't think jungle is the a top 2 role in terms of carry potential. The only under leveled jungler is LITERALLY an afk one.