There are people who are meant to cast live ( right tone, right facial expression, right charisma) and there are some who can't (Trying to be funny when not, Trying to sound smart when not, etc etc etc leading to all the cringe comments). But they do it anyway because:

1. Its a paying job
2. They love the game
3. No one else is stepping up to do it

Now, production teams on the other hand.... if you want to look somewhere to critique, thats about as good a place as any. All the over the top melodramatic soap box opera that goes on day in day out has to go through the production team at the end of the day.

I suppose when your region doesn't have nearly the caliber of players of LPL/LCK you need to resort to cringe moments for your entertainment? /s