How many times do you keep asking for the same answer? Those claims are not backed by substantial evidence. News articles and hearsay don't mean much.
Well you could enlighten us and show us by Mueller's own words where his citations of obstruction were based on insubstantial evidence. When you try to gainsay, just don't. Mueller explained what he thought his limitations were in making criminal charges.
I went to a live class this weekend for the purpose of auto insurance reduction. Our state allows this to that we can get a break on rates by demonstrating an understanding of the rules. In addition, if someone has points for violations they can get a reduction of those to help improve their record. One guy who is very much of your mind said he was there because he got caught speeding, 90 in a 65 zone. The judge agreed to a plea if he completed this course. So when it was mentioned in passing that he was speeding he said he didn't. Why? Because the judge would clean up part of his mess, but he was still speeding according to everyone else. No, he did not he says. How did his brain work this out? Like you, if there are no repercussions the fact that he sped was in essence erased as having been done. Well, no. He did it, there was "substantial evidence" and like you since there was no criminal penalty assigned that meant he didn't do anything wrong and so no evidence could be substantial.
Maybe you and he can meet and discuss time travel and erasing past events which have already happened.