BS.
Every individual who told me they and/or a family member were leaving the GOP and going independent - since shortly after the election until this very moment - said specifically that they did so because the GOP would not back DJT or otherwise show any spine, and they perceived the GOP as happily acquiescing in a stolen election. They have had enough of being lied to by the Republican powers-that-be and wasting their time, money and passion.
EVERY. SINGLE. ONE.
That is not anonymous sources or editorializing.
My scathing letter that I send back in prepaid envelopes to the GOP states just what you’re stating - We are PO’ed that they didn’t back Trump nor did they back election integrity on January 6th.