There's a lot of things wrong with liquid glass. The problem isn't that nobody has valid complaints. It's that you, and others, read those valid complaints and then just literally pretend they don't exist. Frankly, I don't even know how you manage to achieve this level of cognitive dishonesty without stepping back and seriously considering your life and purpose.
Yes, liquid glass does actually have problems. It has performance problems. It can be a big distraction, and some people believe UI whitespace shouldn't detract from the main content. It has huge legibility problems. Sometimes text straight up cannot be read. It has predictability problems. Stuff moves around when it shouldn't, text magically changes colors based on heuristics, which throws users off.
Yes, liquid glass does actually have problems. It has performance problems. It can be a big distraction, and some people believe UI whitespace shouldn't detract from the main content. It has huge legibility problems. Sometimes text straight up cannot be read. It has predictability problems. Stuff moves around when it shouldn't, text magically changes colors based on heuristics, which throws users off.
And that's not an exhaustive list.