Why some animes are mid

Some animes are either mid or worse as example jjba it's worse than mars of destruction not even better written and specially jjba fandom their ego is so full that if you slander their -5.5/10 anime a bit they will either pull out ratio etc and mid piece genuinely don't even wanna talk about it but it's so mid so I have to imagine an mc wandering around the sea for thousand of chapters just to get stabbed by some random parrot grandfather and that's the reason mid piece Luffy is a bum and specially don't even talk about their verse because tanjiro will solo their entire verse yet they will say mid piece is universal and now let's talk about bleach one of the worst series ever written Ichigo always winning the fight aura moments which is dumb it doesn't even needs to be in the big 3 replace it with demon slayer or jjk even mid piece clears bleach