NFL's LaVar Arrington -- I'm Sick of Screaming Coaches ... It's Wrong, Disrespectful

Football coaches shouldn't be allowed to verbally BERATE their players ... so says ex-NFL star LaVar Arrington who says he doesn't understand why coaches seem to always get a pass.

Arrington is dead serious about the issue ... telling TMZ Sports he feels it's downright disrespectful and sets a bad example for coaches to act in such an abusive way toward the players.

"You wouldn't talk to me in any other setting that way ... so why are are you speaking to me in our place of business that way? It's a respect thing."

LaVar says it's especially important in high school and college ... since coaches are so influential in their player's lives -- and yelling and screaming sets a terrible example.