Logan was OK at best, overrated edgelord carnage at worst. The only reason it's rated higher than the other Wolverine movies is that
critics love tragedies. Half of Marvel's movies piss on it from a mountaintop.
the reason it was rated highly was because it was a well directed film that focused on character development instead of big budget michael bay style set pieces of destructions and slow motion explosions (like XMO:W. smh). it had a lot of heart, looked at its subject matter with the self-reflexivity of an adult, and had it not been an x-men related film, would have still stood on its own legs for being a good film.
and as icing on the cake the film spotlight surrounded the acting chops of hugh jackman & sir patrick stewart, whom together can out act the entire MCU roster combined.
on top of that, aside from deadpool, this is essentially the only other marvel movie that isn't afraid to NOT be family friendly.
I actually really like the MCU films, and you are correct in that they are consistently better per movie than what Fox has made, to date.
However for the most part they are so kid-friendly i feel like mickey mouse could make a cameo appearance and break out in a musical with the other heroes jumping in, and it would still fit in with the flow of the universe. the lack of any real, foreboding threat is the biggest issue i have with their MCU films in general, aside from the winter soldier of course; no surprise as the Russo brothers are brilliant.
I mean, this is all leading up to Thanos & the infinity war, but thanos in these movies has been an unthreatening joke so far. this is suppose to be the 'big bad' titan that everyone needs to take seriously. There have been at least 6 MCU films that mentioned or featured the marvel galaxy, and none of them did anything to build up Thanos as a serious threat.
just in comparison, in one of the worst Marvel movies ever made (FF:RotSS), Galactus, even though he is essentially off screen the entire film, had a more lasting impression than Thanos ever has to date. fucking silver surfer did more justice to the foreboding nature of galactus in one fantastic four film, than the entire MCU has to date, for thanos.
i'm rambling now, so i apologise, because i really like the MCU and the films are well directed for the most part, just don't downplay the rare great fox x-men films because when they get it right, imo they get it REALLY right.