The FBI has been corrupt since the days of J. Edgar Hoover, who framed 4 innocent men for a murder an FBI informant committed. Hoover knew the men he framed were innocent and yet they were convicted, with 3 men sentenced to death and one sentenced to life. Two men died in prison and swamp officials like Robert Mueller kept the others locked up, knowing they were innocent, until Congress looked into the case, overcoming Mueller's refusal to release records of the case to Congress, and found the men had been despicably wrongly convicted and set them free. The US had to pay more than $100 million in damages for the wrongdoing committed by the FBI and all those (like Robert Mueller) who covered the sins they knew the FBI officials had committed.
Yes, almost from day one after the 2016 election Obama and the corrupted FBI spied on and colluded against Trump with the declared intention of destroying him and removing him from office.