Imo, some standard libraries were massively overusing them. So, you needed to handle checked exceptions for stuff that you cant do much about or are highly improbable and genuinely should be runtime exceptions.

But other, even more common source of hate is that many people simply do not want to handle them. They prefer if they can kind of pretend that stuff does not exists and look like "10x fast developers". You are technically faster if you ignore all that stuff while someone else fixes your code later on in different ticket.