Thresh has 2 hooks, and they're both wayyyy to long.

Fix their broken hitbox first, then we can sit down and discuss about their range.

As for range, at least after seeing Pudge's hook from Dota, this 2 ain't so bad after all. The slab of meat can hook people over the distance equivalent to 2/3 of the river's length or something.

I only see one hook, though you may have mistaken his auto attack animation that flew by Ori at the end as a second one.

The hook was normal length but because it hit a max range target who has a pretty low hitbox (Malzahar) it looked quite long when it stretched because when hooks hit targets they draw a line from the center of the character model to Thresh/Blitz/Naut, so if they hit low on the character they stretch visually to connect with the center.

On top of this Thresh was facing away which makes the hook look even longer because it visually is attached to his hand even though like any skillshot it can be cast in any direction an equal distance.

Hooks just tend to look finicky after hitting things because they have to draw a line from the hook throwers hand to the center of the target's body regardless of how the hook thrower looks or where the enemy was hit.

https://gyazo.com/161464ccdb1bd233604768ccf32cc8d0 This right here, is exactly what I mean.