> you are confused

No, I'm not. I'm just not drinking the "philosophical" Kool-Aid.

> do particles exist or not?

What difference does it make? What should I expect to see if particles "exist", that I should not expect to see if they don't?

> what about the everettian multi-verse, is that real or not?

Same question as above.

> by saying these SCIENTIFIC questions

If you can't answer the questions I posed above about what difference it makes, on what grounds are you saying such questions are scientific?

> are trivial to answer

I made no such claim. You are attacking a straw man.

> it's the consensus in physics right now that it can't say what "really exists"

I completely agree.

But you appear to think this is a flaw in science. I think it'a a flaw in the question "what really exists?" And as far as I can tell, that's what most physicists who hold the "consensus" position you describe think as well.