Common sense without information is all too common, ie, you evidently haven't read the report. It clearly states it is not an exoneration of tRump. In fact, the reason Mueller didn't go further in charges was, as stated, the memo from Barr and his DOJs official policy opining that a president can't be charged for any crime. But to your own point, almost every single high-ranking person working on tRump's campaign - even some with secondary relationships - had a connection to the Russians... Flynn, Manafort, Gates, Papadopolus, Cohen, Stone, Pinedo, van der Waan AND tRump asked for Russia to interfere on national television! But if you are defending tRump by suggesting he's too stupid to notice what was going on in his own campaign, that is the best defense.
I guess Hannity, Coulter, Limbaugh, Bannon and Fox and Friends' hands were enough (though I'm sure there's plenty of room for many more). But before you decide that there's no there there, might want to wait for Mueller's actual report instead Barr's sticky note or your own myopic meme.