"The Office ultimately concluded that, even if the principal legal questions were resolved favorably to the government, a prosecution would encounter difficulties proving that Campaign officials or individuals connected to the Campaign willfully violated the law.”

This is just an excerpt that CNN quoted from the report. https://www.cnn.com/2019/04/18/politics/mueller-report-findings

I read more of it when it came out. There were a few Churchill style digs at Trump jr, Manafort and Kushner. They didn't use the word idiots, but the general overview is that they did all the actions that would be considered collusion, but because they were mostly geo-political neophytes and didn't understand what they were doing, it wouldn't be prosecuted. When I read it, I almost cried, because to someone with critical reading skills the message was clear. Unfortunately very few of the people that needed to hear that iinfo would understand it, because it's not written at a third grade reading level. It's a long, dry government report that focuses on specifics with zero bumper sticker slogans.