I'm convinced there are some semi-classical explanations that just haven't been figured out.

Electrons are helically moving photons: https://www.researchgate.net/publication/281322004_The_elect...

That's some interesting/wacky stuff, but there has been more research to improve those calculations - like deriving the electron charge and magnetic moment.

Personally I like the idea that a proton is somehow literally an electron and 3 up quarks (a neutron gets 2 electrons and 3 up quarks). I am not a physicist though, so I'm sure there are reasons they "know" this is not the case.

I find it fascinating that some physicists say wave functions are somehow "real" and then we've got Jacob Barandes saying you don't even need wave functions to do the computations of QM: https://www.youtube.com/watch?v=7oWip00iXbo

IMHO there is a lot of exploration to be done without particle accelerators.