It is possible to criticize individual Republicans, or even the individual actions of individual Republicans, without dumping on ALL Republicans. All dumping on all Republicans gets you is to be dismissed as a crank. Not that we don’t have plenty of those around here, but portraying everybody as the bad guy and everybody that has a different viewpoint than you as evil just alienates people.
Using the term RINO (Republican in name only) is the usual way to ensure not all Republicans are “dumped on”. RINOs have many common characteristics that they are not afraid to flaunt, to boot. The other term is “establishment”, sometimes written as “GOP-e” for short.