All the previous proof put a dent in their brand but these allegations are actually brand destroying. Linus is evidently an asshole to his workers in his videos so I don't have a hard time believing her allegations. What a fucking dumpster fire.
I wouldn't be so sure about this being brand-destroying. Activision-Blizzard and Ubisoft have been exposed as being full of harrassment and toxic work culture too, and they're still doing just fine. Maybe Linus himself will fuck off somewhere in disgrace, but the brand itself will live on. In a way, it was the perfect time for these allegations to come out as they've not long got themselves a new CEO. He can claim that he knew nothing about what was going on there, and make empty promises about how things will be different now he's in charge, etc.
Blizzard and Ubisoft have huge games under their belt that make them a ton of money, Especially with Microsoft now owning blizzard they're not going anywhere. LTT on the other hand relies on sponsors and the community to make most of their money. It's too early to make a conclusion but if these allegations turn out to be true, A lot of sponsors will absolutely pull out and the community would give them even less support than they're getting now which probably won't be financially viable to keep the company around if they get to that point.