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Could always start another channel if it doesn't improve
I've witnessed this exact behaviour with a worrying trend on other undergrad courses - it really is ridiculous.
If it's any consolation, the big-headed guys are usually the ones that come unstuck later, and almost everyone will have the same negative opinion of them. Keep your head down, work hard, and ask questions of people you trust rather than on that slack group, and I'm sure you'll go far.