>>11332485fundamental particles exist for sure. scientists at the LHC are able to identify them basically unambiguously using e.g. b-tagging and tau-tagging and etc.
the reason you might get any other idea out of the physics literature is e.g. montonen-olive duality or other stringt ideas, but since those ideas are purely speculative and not real science at this point in history, you can be safely sure that fundamental particles exist thanks to empirical evidence
