If you don't wanna pay for a VPN. Ring up your isp, and tell them that when you are trying to watch live gaming streams and that it is buffering. They should then take the throttle off your account no questions asked. Nothing wrong with trying to stream someone's video game footage
Maybe you're on a shared bandwidth and your branch of the network is overloaded. Maybe there's a routing issue between you and the iptv servers. There's a dozen more likely situations as to why it's buffering vs you being directly throttled. But you're right, it never hurts to ask, but probably won't do anything