The problem was that Trump naively thought he had support from several repubs and took them at their word, they blindsided him. So appointments like Sessions and Wray bit him in the ass.
If he wins again I hope he will have better luck, unfortunately the swamp has a lot of dangerous chameleons that will only on show their true form (e.g., Barr) when it does the most damage.
If Trump wins in 2024, Mitch McConnell will still run interference on who he appoints to key positions, like before. McConnell is a huge obstacle for Trump and his agenda.