Earlier quoted context omitted.
Three of your points use the word "weird" which immediately puts them in the subjective category (hint: zero argumentative value). "No bounce scroll" is subjective as well, hence no real argument there as well. Non-native text boxes is a 50/50 issue. I get that it can be alienating for some and that's just as valid as me not caring. But it's still subjective and bears zero argumentative value as well. Telegram Deskto…
Well, clearly you're either not sensitive to or don't care about look-and-feel issues. To those of us that do care, it's a big deal. Just not being able to use C-f, C-b, C-e, C-a &c keyboard shortcuts in text fields is pretty much a deal-breaker for me. No argument here that Slack is hideously inefficient.
Aesthetics do matter a lot but they must always take a back seat to efficiency, is what I'm saying.