“Nope. It was because McCarthy did not live up to the terms of the deal to which he agreed in order to be elected Speaker. Gaetz and the others just held him to the deal.”
210 Republicans voted to keep McCarthy but Gaetz and 7 other Republicans voted with all the Democrats to remove him.
Because he did not live up to his promises. He gave Biden a blank check for two years, more than the Dems were even asking.
The deal McCarthy agreed to be elected Speaker was that if even one member desired he could call for a motion to vacate. And that's what happened.
If McCarthy would have fought the Dems on their out of control spending and stood with the conservatives, he would still be Speaker today.