You can't surround yourself with enemies (even unknowingly) and have things come out right.  A lot of people think Trump did this knowingly (to keep an eye on things) but I am not of that opinion.  I tend to agree with the writer of this article:

https://www.lewrockwell.com/2020/09/paul-craig-roberts/what-was-trump-thinking-when-he-appointed-an-enemy-to-head-the-fbi/