I half trust them
I've read stuff with 8-9 rating that I enjoyed but wouldn't call great(more so turn your brain off and read) I've read 8.9 stuff that I think deserve over 9 and I've also read stuff with around 9.1 that I hated
But generally they are a good indicator to get an idea of what people think, but I don't base what I read completely on them (except if it's below 8 something, then I will probably not read it)

Do you guys trust the star ratings here?
Cause i just closed the tabs of all the 8.9 and below manhwas that once piqued my interest, marinated and planned to read over the past years, i closed around 250 plus, and yes, i forgot the want to read option