Sherlock is a show that commits the cardinal sin of trying to be smarter than the writer with the show being unsolvable by the audience this is not bad in of itself however when it is solved you don't feel that AHA moment instead you feel as if there was not much of a string leading you to there. A better way of doing it would be to leave clues leading to a culprit but not giving enough context for you to conformable make an accusation.

This show is also a great example of overproduction with many impressive camera shots and effects but with no real purpose in many films or tv shows these may only be saved for more impactful or climactic moments but not for Sherlock it almost seems as if they have too much money to spend per episode or per season. This issue in my opinion goes hand and hand with the writing leading to fewer moments that can be used in this way

this show can be good even great however these two issues make it far from the worst show on tv but an annoying one.