Like losing?
Republicans need to rally and win. We've got just 1-1/2 years to the next administration. Hopefully Biden won't get any supreme court nomination opportunities but the next president surely will. You'd promote a Democrat win and allow them to reshape the court in 2024?
And it is Trump giving it all away. Imagine if he'd STFU about fellow candidates, if he was inclusive about building the party? Right now, he's shoring up his die-hard supports, but nothing further. Outside of them, he's losing and making himself a pariah.