Crash to airplanes into each other at high speed and you’ll find new particles too.
That's true, but the "new particles" will just be rearrangements of the original atoms that made up the airplane. Not one single atom of the airplane will be destroyed, and not one single new atom will be created.
In the case of the particles created by the LHC, the protons and neutrons of atoms are being ripped apart into the quarks that comprise them, and these are then reassembling in new ways, ways that (in some cases) are so unstable they only exist for an interval of time that's less than the amount of time it takes for light to cross the diameter of a proton.