"High energy particles" aren't going to do anything, and anyway (if you consider solar wind separately, as you suggest) they come from all directions equally so their effect would be nil. "High speed collisions"...with what, except the particles?

Yes, I do think they model the entirety of known physics. Maybe not all at once but at least separately, perturbatively, to verify that none of the effects are remotely strong enough together or separately to account for the discrepancy. Do you really think everyone would be freaking out, spending months or years to develop special theories to account for this, if they couldn't rule out the things on your list first? Wouldn't they fear being discredited by their peers because they are complete idiots?

The thing that baffles me is you think these people are so stupid. Despite being experts in their field, and despite having studied the data intensively, you really think every one of them has completely overlooked the most obvious explanations in the world.