why are people saying Blockchain.com is a scam?


I've heard ever since 2017 that Blockchain com is a scam. So I never paid attention to it.

Apparently it's still around. I want to know: what makes it a scam? Did they do something in the past like Robinhood?

And if they are a scam, how is it still around? How is it still here and things like Celsius are gone?