Same here, i can't wait to ditch my old xiaomi 10 full of bloatwares and ads

Exactly, seems like this should be up to the consumer. The devs can say: pixels have best security, here's a 2nd and 3rd option, here's their pros and cons.

Because as much as I approve of privacy measures and security, my phone doesn't have any lock screen. No pin, no biometrics, nothing.

I work from home, I don't really travel, I have 4 children. Physical security is annoying. I want grapheneos for data security. I don't have people trying to steal my phone, I do have people constantly stealing my data.

And without a non-pixel option (fuck google), I'm likely to go for to a competitor because, while their data security might not be as good as graphene, it is better than what I currently have.

GrapeneOS have a specific goal related to security. You can install one of the others, like LineageOS, if you are happy with the tradeoff.

No other phone supports the relocking bootloader and that is there requirement. There is no other phone they can support. You might not like their requirements but they are pretty clear about it.