Worst Teamfight Hero?

Youtube, good sir, will prove you wrong. They're very rare, but I've found that some Techies players are actually very good at teamfights, stunning, mining, and Euling all over the place.

Aghs remote mines are ungodly powerful and can be fired from range. One single remote mine can do a lot of damage to the enemy team.

I also agree that Huskar is the weakest team fighter due to the fact that he relies on losing health to do more damage. All the enemy team needs is a couple of stuns to lock him down and he's dead.

Making your enemies focus all their stuns on you isn't a bad thing in teamfights, depending on your lineup. "A couple of stuns" win over any Hero anyway, so I don't think that's a valid reason to say Huskar is a bad teamfighter. As said before, he can stack Burning Spears and even deal burst damage on a single enemy with his ulti; his high HP and magic resistance also make him diffcult to bring down so the enemies have to focus him really hard, not only with stuns but also with physical damage.

I don't know, I don't think there is a worse teamfighter than Bounty Hunter except maybe Nature's Prophet without a Hex, since a teamfighting NP hurts his team more than a split pushing NP in the first place. His Wrath of Nature wins teamfights even if you aren't there though, so you can count him as a "teamfight" Hero even if he's split pushing.

BH lacks teamfight presence, the only thing I've seen that was useful was one time, BH tracked a WD and some frontline dude, then shurikened the front dude and stopped death ward through the bounce.

Viper is better, he offers some control with his slows. He kites enemy heroes without putting himself in danger like BH would.

Huskar is also serviceable, mainly because I use him as a disable magnet (does not work against mass AOE disables however). Granting massive regeneration for a carry or tank also is nice and useful.

Unmentioned heroes:
Nyx Assassin without dagger (not uncommon in pubs)
Terrorblade until he has a massive stack of gold. Clinkz similarly, but with less gold requirement due to better early damage and far range.

Riki deserves a special mention since he's basically Bounty Hunter with an aoe silence. Smoke Screen is really all he has to contribute to teamfights, if he survives long enough to get it off. Because the way I see it, Riki's teamfight routine is this:

1. Approach teamfight to lay down Smoke Screen
2. Get revealed by enemy true sight (necrobook, gem, Slardar ulti, pick your posion)
3. Enjoy your last few seconds of not being dead

Definitely Sand King and Tusk. They so bad. They do nothing in team fights.

But Smoke Screen is an amazing ability. That's the thing, he might only have 1 AOE ability up on Bounty Hunter, but it's honestly one of the best ones. An AOE Blind Silence and slow is silly.

That and he has better burst than a Bounty Hunter technically, because he is guaranteed to get amongst supports or even kill them with Blink Strike. And well, forcing supports to die really early, or to waste there spells on less than ideal targets is under-rated in team-fights.

Whilst yes, he is a better pick-off hero than a team-fighter, he's not exactly bad in a team-fight either. Only have one team-fight ability to contribute doesn't make you a bad team-fighter. It's dependent on the actual ability.

Sand King is awesome in team fights. Ult wind up to blink = massive aoe damage. Add a nicely placed burrow strike to stun some heroes with then plopping down sandstorm and the team fight becomes a mess. The only weak ability he has is his poison modifier.

Tusk has a good initiate/escape in snowball. His frozen sigil is annoying to fight in. Ice shards are good at negating escape and walrus punch is just cool.

Speaking of carries: Lifestealer. Seriously, he doesn't do a thing other than click.

Haha it was sarcasm. I know they are really good. It was a joke.