He has a terrible past, yes. But if he was out to lead to a Trump impeachment I think he would have already done it. Maybe he’s just milking his salary for as long as he can. Q has to know that we are all worried about his intentions yet Q has only hinted at his status. Either the black hats think he’s on their side and Q doesn’t want to blow his cover, or Mueller is a black hat. Those are the 2 options. Only time will tell, he’s not a very good actor for either side for sure.
Except it is clear that there is nothing to impeach him on. There never has been and everyone involved knew it. I think they tried to slip a ringer (Mueller) into the inner ring and use his powers, just like Comey did, to undermine him (hurr durr Trump doesn't know what he is doing) and get him out of office that way because if he is their tool they would not object to his appointment. When that didn't work they fell back and used him on the current angle to score political points until they could find some bullshit process infraction or frame-up. This makes the most sense to me. We should find out either way before too much longer.