First - Cultural differences are almost certainly at play here if you're not American. My only exposure to non-American workplace culture is a single German friend, and familiarity with how Linus Torvalds operates. Suffice it to say, cutting across someone to say "bullshit" would be considered "heated" in most American tech workplaces, no matter how calm your tone of voice and body language is. I'm struggling to find a way to say this without sparking a discussion I definitely don't want, but this kind of goes hand in hand with all the inclusion and sensitivity training that was very popular in American corporations until very recently. You can't really emphasize the importance of always being kind and inclusive and butterflies and rainbows without creating a culture that's a bit more sensitive about people acting in any way pissed off.
Second - I'm not sure I'd call the choice of call participants a "power move", just standard American hyper-legally-conscious practice. Surprise layoffs or pip firings are usually done with an HRBP you've probably never met before leading the call. Sometimes the manager may be there but frequently they won't talk much or at all.
Third - Not necessarily. The others may have been struggling to close sales as well. The only things I know about this whole thing come from reading the text in the OP and watching the tiktok video so I could easily be missing it, but is there any evidence that this is anything other than letting go of sales people who aren't performing? I think this is extremely common in sales, it's pretty cutthroat. You close deals or you don't, and companies are always asking "what have you done for me lately?"
