My first thought is prima donna. Basically made a spectacle of himself to seal up base support.
Spectacle? McCarthy agreed to giving only one member (vs. a majority of members) the authority to call for a vacate the chair vote if he didn't keep his promises on regular order, single subject budget bills, no more continuing resolutions, and a commission to reduce the debt, to name a few. One man had what McCarthy dismissed ---- the guts to exercise that authority.
BTW, when did "sealing up base support" of your constituents by doing what they voted for you to do become a negative? When did rolling with the Uniparty become the preferred expectation?