Are the people in this world all just scummy trash? A lot of things basically don't add up unless that's the case.
Ok so they kick him to die in the dungeon to a boss I guess that could be hidden pretty easily. Oh, everyone gets a free resurrection. So he dies and just tells everyone the groups a bunch of shitty traitors. Unless the managing guild is totally corrupt or everyone is scum, no one would want to join their party to replace MC and they would find it harder to get jobs later. Oh ok, even worse there's live streaming. Even if they weren't livestreaming when they sent him to his death, he was streaming during the boss fight. Presumably, there's audio so all the viewers would have heard about his scum bag party sending him to his death on purpose just to get him out of their party. Great so there's video evidence of it too! The party sure does have extra intelligent decision making skills. Surely people will be very happy a high level adventurer was deliberately removed from the work force for no reason at all.
Lets ignore the chat being exclusively low value simps dying to say cute vampire boss as if betraying your lifelong friend is a normal tuesday afternoon. There are tons of questions this brings up. Why did they specifically wait to banish him so he would lose his main or only source of income? Why didn't they kick him before the dungeon? Why not just introduce him to another team that needs the fill? Why do they call dying to a hidden boss a farewell gift when it's only reasonable to assume that it would only disadvantage him immensely in a world that had to quick evolve to deal with dungeons? Why is the the vampire the only expressive character and everyone else is as dull wood?
Will any of these questions be answered? Well it's not a web novel so there's a chance the writer actually thought about this but I bet the answers still be stupid and unsatisfying. I bet the writer will say some bullshit like once you form a party it can never change unless someone dies.