I guess he just indicted all those Russians for the fun of it then.
Also, all the things you listed? I have no idea whether he has done that or not. Do you? You got a friend on his team?
Part of the problem is you seem to have Mueller confused with the Cohen investigation. Two totally separate things.
Well, since Mueller's chances of prosecuting all those Russians is slim and none, I guess it was for fun.
As for how do I know Mueller isn't pursuing other Russian meddling angles.
1. Like everyone else, I have seen no news stories about targets or subjects being interviewed from the other side of the aisle and that would mean no leaks which is unlikely.
2. I have seen no Russians indicted for the uranium one deal or other scams and I have seen a whistle blower being ignored at best and possibly being undermined.
3. If Mueller was investigating all things Russian, he and Rosenstein would be required to recuse since they have been involved in decisions favorable to Russia where Russian corruption has been alleged.
The bottom line is all the Russian meddling would have been treated just as it's been treated for decades if Hill had won. There would have been a few hearings and cons would have complained about Bill and Hillary's sweetheart deals and there would have been nothing more than some theater for the masses.
Imo, nobody cared about Manafort or his dealings until Trump won. Hell, K Street is full of Manaforts. The problem with Manafort is he's had yrs of access, knows where a lot of skeletons are buried on both sides of the aisle and none of the corrupted pols on either side wanted him sharing his knowledge with a POTUS that might not be willing to play the game.
If Hill or Jeb would have won and hired the exact same people, it would have been business as usual. Otoh, the establishment is willing to create a constitutional crisis to minimize or get rid of Trump all together because scumbags like McConnell, Biden and Kerry will do anything to protect their ability to sell their influence for hundreds of millions in personal gain and Trump is a threat to gravy train.