If you changed your mind about Mueller just because he didn’t find anything, you’re not very bright.
Those on the left should be happy to know that this new brand of social-fascism for political ends is at least a moderately-effective tactic. Enough of them are smart enough that they’ll continue to use it.
Those on the right should remain furious over the sleazy shit – a series of actual treasonous conspiracies – that led to Mueller – a “public servant” – being placed in a veritable political God’s Chair. Those on the right should also be demanding that nobody ever again is given the level of extra-constitutional power that Mueller had. If a special counsel’s charge is not specific and as narrow as humanly feasible, it is likely that the office doing the investigating will go rogue because they start to take it as their mission to find something, anything, ANYTHING, to justify their efforts and prejudices.