Lol, how would you know what it takes for this type of investigation? There are a lot of people involved and a lot of data to comb through. Trump supposedly supplied a million items.
The point that you are dodging here is the text of the juvenile cartoon in the opening post, where it implies that Mueller could wrap thing up sooner if Trump wasn't so busy breaking laws in general. An investigation on collusion is much simpler than combing a persons entire life history for anything that could be used to smear him. If Mueller just did was he was supposedly there to do, he could have wrapped this up a long time ago. This is what you are wanting to avoid discussion of.