Depends on the meaning of "tied." Many of the people on his campaign staff, as well as his administration have been connected to the Russians. Some have been indicted and others have pled guilty.
The President has also obviously lied about meetings and other connections to the Russians throughout his campaign and presidency.
So by any sane standard, yes. There are plenty of ties between President Trump and the Russians.
First, you don't know what you are talking about. Mueller was appointed on May 17, 2017. Unless you are living in an alternate reality, then you are absolutely wrong.
Second, as all sorts of people here have pointed out, you don't have any basis of knowing what information has been put together. Mueller doesn't do a public information dump every evening before he goes home. He is conducting an investigation that has been consistently bearing fruit. Looking at the pace of guilty pleas, indictments, and his desire to interview the President, I imagine that this investigation will be nearing its conclusion in the next few months. But I certainly don't know anything for sure and you don't either.
Third, your irrational desire to shut down the investigation makes me think that you are afraid of what is about to be uncovered. I can understand that. I lot of people have damaged relationships and staked their reputations on President Trump. If he is demonstrated to be a con man, a lot of egos will be potentially damaged, and many people believe that the never-Trump people are incapable of grace. When someone is conned by a con man, the person who is guilty is the con man, not the one who has been deceived. But like the best con men, I think President Trump has pushed his supporters into conning themselves (creating an "us against them" narrative and declaring himself to be their only hope) because he knows that it will take more than reason to shake the faith of one who has conned themselves.