Those two concepts are not mutually exclusive. You can blame 3rd parties AND recognize the GOP’s faults at the same time.
Especially when the 3rd party is a Dem plant, and the idiot libertarians (not all, but you know who you are) fall for it.
The dems wouldn’t be able to have a plant if the GOP had worthy candidates. People are voting for the guy they think best matches them, if that’s not the GOP candidate it’s not the voters’ fault.