It only seems incompetent if you believe the FBIs mission is to honestly root out criminal activity without regard to politics.
Unfortunately, the FBI isn’t as pure as the driven snow, as some are led to believe. It has quite a dark history, but when you challenge the biggest and most “influential” law enforcement agency in the country, it’s hard to take them down. You had Ruby Ridge, Waco, then the Finicum shooting. But, also this....
https://www.youtube.com/watch?v=f2168lwQLDc