This wouldn't surprise me in the least, in shooting games. People don't like watching someone getting their ass kicked. Also, to succeed as a streamer you have

This wouldn't surprise me in the least, in shooting games. People don't like watching someone getting their ass kicked. Also, to succeed as a streamer you have to stream ~40 hours a week or more, and there's something called "aim fatigue". After an hour or so without breaks, your aim goes downhill. Anyone who maintains amazing aim for hours of continuous play is cheating. That's why you see experienced, successful streamers taking breaks, or interspersing "hang out time" or a non-aim-based game, etc. Stream framerates / compression can make it difficult to tell what's going on, and using a controller means it's nearly impossible to see whether their controller movement matches on-screen movement. But controller aim assist is so strong in many games these days that if you have experience with a controller you can easily dominate all but the top mouse and keyboard players. Shooting-based games just aren't fun these days. Between the cheaters and the streamers you get your ass handed to you pretty regularly, except when matchmaking throws you an easy game to keep you from rage-quitting.