That's a bit presumptuous. My issue with Safari isn't that sites don't work; its seems comparable to Chrome in that regard. But using it doesn't feel as nice as Firefox or Chrome. It's harder to find features I need. Though to be honest, I find all browsers a bit lacking. I want more granular control over which cookies to accept and for how long, and how exactly to treat various sites.

And I certainly don't blame browsers for badly written sites, but blaming the site doesn't magically make it work either. Having less sites work for me is still a worse experience, no matter whose fault it is.

Safari seems to lag a lot in features. In compatibility it's a modern IE

Hardly. It took how long for Chrome and FF to support position sticky, or backdrop filter?

This is my experience as well. They are much slower to meet standards.

Spotify and some video sites do not work on Safari, which is mind blowing to me.