My main problem with liquid glass is it's slow, and the trade off is... a worse user experience in literally every conceivable way? Wow, okay, not a very good deal.
Granted, most downgrades in things like legibility or density are very slight. But they're still downgrades. Downgrading is only worth it if you get something out of it.
It remins me of some gnome themes from 2005-2009.
I'd choose that a thousand times over an ad filled start menu