Because the promoter of the championship did a shitty job and in case od Cyprus also because od the island location and bad date.

It helps nothing to address wrong reasons. R5 are way more durable than gr.N which were main cars in ERC until 2007 and they are not less durable than wrc around 2000 when they were allowed in ERC. Same can be said about 2wd. It wasn't any better in the past.