Likud is Netanyahu's party. I think you are confusing them with Yamina, which is Bennet's party.
Liked desertions forced him out. Gideon Saar took a bunch of Likud with him leaving Netanyahu without his base intact.
Meanwhile, Bennett played patty-cake with Lapid and others he previously swore to never do deals with.
But it was Likud members pulling away that did Netanyahu in.