I actually like only the first John Wick movie. I know unpopular opinion, but it’s true. The first movie was simple, direct and just gave a tiny glimpse at a world that has some rules...but they are not rules to show the underworld has some ‘values’ and structure...so just sit back because it’s still a revenge flick.
However, all the subsequent movies go crazy with the ‘secret society of assassins’ world building - the world has too many rule. You cannot fight or kill here, here or here; but you can fight here on alternate Thursdays after cocktail hour.
... Of course unless otherwise specified by a 'ruling elite' who the anarcho-syndicalist commune you could fight on a Wednesday. Because the elected officers of the ‘secret assassins guild’ take turns to act as a sort of executive officer for the week. : But all the decisions of that officer have to be ratified at a special biweekly meeting. By a simple majority in the case of purely internal affairs,--
The world of John Wick is just , because they try to explain it more or fill out the world unnecararrily. What was so wrong with an ex-hit-man comes out of retirement to track down the gangsters that killed his dog and took everything from him? The first rule in the first movie is easy...you don't fuck with someone who was 'made' or part of the system. John was retired, but he was not to be fucked with like civilians (i.e. Common people, normie) - "Organized crime- 101" level stuff. John says, "You gotta fix this" and they say fuck off. So, he kills everyone. However, as soon as the second movie they lay on the "wacky-weird world" on too thick and it ruins the other movies. Suddenly, everyone is a "character” out of a 1990s David Lynch film - it is world building gone amuck. The producers/writers think it is all very clever; but, it is just dumb.