Particles are very useful concept, used seriously also in elementary particle physics. That the concept does not fit mathematics of quantum fields is an incompatibility of the two approaches, not evidence that particles 'do not exist'. The articles you've linked do not even attempt to prove that particles do not exist. Sure, explaining wave behaviour of light with particles is almost impossible and field theory (wave theory of light) is superior. That still leaves the possibility that electrons, protons and neutrons are microscopic particles; currently known to be smaller than 1E-14 m.