A good film ruined by inconsistency

Rating: 2/10 (29 August 2018)

(contains mild spoilers)
Im confused why this film has such a high average rating. The plot of the entire film revolves around John Wick being some kind of super assassin, the best of the best.
During the film we see him kill people with guns, knives, other random objects and his bare hands. It seems everyone in the criminal world knows him, everywhere he goes people know who he is, even door men at clubs. They all seem to know that nobody messes with John Wick
Yet at the beginning of the film he is beaten up by some criminals that broke in to his home. These criminals come from a gang which he worked with 4 years previous. Everyone in this gang appears to know who he is, except for the 4 guys that raided his home - how convenient?
The problems with the plot are as follows:
Super assassin has no home security?
Super assassin goes down stairs in the middle of the night following his dog that woke him up and does not consider the dog may have heard something?
Super assassin can shoot people through walls without having to see where they are (happens later in the film), but can't tell there are 4 guys in his own house
Super assassin does not even attempt to block blows from guys in his house beating him up, but exhibits super martial arts skills later in the film
Im not done yet
Super assassin can do head shot after head shot for minutes on end, then misses multiple times when aiming at key characters whose death would have ended the film prematurely. This happens twice, once when the son in running from the pool and again when the father is in the car
The way the director plays with John Wick's abilities, now he is god, now he is mortal, now god again, depending on which fits his forced plot ruined the film for me