This is the weirdest poster-related D&D hobby horse I've ever encountered. Eberron is ruined because the FR and it both exist in the lore? Really?! Because of factually existing polytheistic gods?!? Great googly moogly.
Neither the settings nor their inhabitants have an existence outside of the way a DM and set of players decide to use them in a particular game. Don't use the bits you don't like, that's how 5e works.

Neither the settings nor their inhabitants have an existence outside of the way a DM and set of players decide to use them in a particular game. Don't use the bits you don't like, that's how 5e works.