Who says he's fine? He clearly needs work.
If he's supposed to be a juggernaut, he needs to have more damage threat against non-squishies.
IF he's supposed to be a tank, he needs more utility and crowd control.
Either way, he needs some innate tankiness, because unless you snowball hard, he feels way too squishy to access any of his real power in team fights. His passive is very weak and easy to counter compared to the sustain/tankiness that modern tanks and juggernauts get built into their kits.
Even if he were balanced, he would still deserve a retooling. His kit has practically no skill expression. Basically the only decisions you make are who to flip and when to bite.