Report or not?

hello together, I have a question.. the following happened: I drove today the highway XXX, which leads past XXX. in a 100kmh zone drove in front of me a golf 4 with character XXXXXX. because this drove slightly slower than the allowed 100kmh, I set quite normally to overtake. during my overtaking process the driver of the golf suddenly gave gas and thus did not let it overtake to that I could unhindered. even against the end of the 2-track track where it then becomes 1-track, l he didn’t know that I could put myself in front of him. that’s why I slowed down and rearranged myself behind him again. because because of his behaviour I used the horn several times loudly to point out his misbehavior, the driver braked strongly in the middle of the federal road and brought his car to stand in the middle of the road, opened the door and threatened to get out, which he did not do. behind us were already more cars, which had to brake naturally and auc h already horned because it didn’t go any further. he closed his door and drove off with full gas, so I was not able to follow him with the permissible maximum speed of 100kmh. he overtook several cars to probably get out of my field of vision. probably he knew that he had now built quite big crap. so he endangered not only me and my girlfriend, but also the other traffic participants and himself. I had my girlfriend at the time. the driver of the golf’s was alone. have already filled in an online contact form of the police, which have already contacted me by phone 10 minutes later!! I was asked how I want to proceed. whether I want to leave all this on my own or whether I want to post an advertisement. I said that I want to display the case. I have nothing left for such a Schei*** in road traffic. certainly not at all on a busy country road! What do you think about it?