No, that's a very uninformed take, and contradicted on two fronts:
1. Microsoft's other native apps have gotten unusably slow lately, too.
2. There's definitely plenty of fast web apps.
I don't mind snark, but make it factually accurate.
This is just Microsoft's poor strategic decision to try to drive as many as possible to Linux. Hell, weren't they bragging recently about managing to make opening the start menu take only a tenth of a second? It should be instant.
Maybe they think we'll replace users with AI, too. AI is the only thing slower than Microsoft's UIs lately.