Although I agree with you, in LSB's defense he streams his own games on YT at least as often as he does DSP stuff. My read on LSB is that he doesn't want to be looked at as a "DSP Restreamer" but rather a "casual streamer that sometimes restreams DSP." I'd say he's been moderately successful with that.
It's a fine line to walk. Nothing wrong with LSB interacting with his chat. But as a consequence, it's natural for a horde of attention-seeking autists to come out in full force. It's the way of the world, nothing he could do.