[{quoted}](name=Crescent Dusk,realm=NA,application-id=3ErqAdtq,discussion-id=99ds253A,comment-id=000b000000000000000100000000000000000000,timestamp=2019-09-08T17:47:08.473+0000)
He's gonna be shit at teamfights either way, if you don't have ult, what the fuck are you doing in TF anyways. Your job in tf is to make the enemy frontline wet toilet paper by ulting them.
The rest of the time, you should be split pushing as trundle takes turrets like few people do and few can duel you at any point of the game.
He's not a discount jax/yi because jax/yi need to be close to full builds to be able to start dueling bruisers and tanks in sidelanes. Yi will get wrecked by a Renekton in a way trundle won't in the mid to late game. Jax won't make it out of laning phase as he takes forever to come online if the opponent is smart in lane with aggressive play or in jungle with early invades.
Trundle doesn't scale as well as either of them but that's because he doesn't have anywhere as close to an atrocious and easily abusable early, and he still trumps both of them in eliminating tanks out of team fights. Neither Jax or Yi deal with the deeply obnoxious late game Garen/Shen/Poppy like Trundle does. One ult and all those die in 3 caitlyn/jinx autos.
Trundle's teamfighting is great with maxed out Pillar and capped cdr, that shit wins games. Why do you think they keep his Pillar in a hard-nerfed state, while trying to buff the rest of his abilities?
While countering tanks and juggernauts is something he's great at, he can easily make plays by peeling/trapping opponents with his E, giving his team free reign to poke the enemy to oblivion.
He wouldn't be so good at supporting (with support/tanks build no less) if he couldn't teamfight. High elo Trundle players on SR typically max Pillar first and run Aftershock/tank builds, and that playstyle is generally what gets him nerfed.
His damage builds have been lackluster for years. No one at high level play builds him like a carry anymore, with his level of utility (coupled with piss poor damage scaling) there's no point.