“The ending suggests that there’s a…sequel…Audiences have suffered enough.”
Also:
95% of Google users liked it
89% of Rotten Tomato audiences liked it
The average audience rating was 4.4/5 (18,619 reviews)
My mother, who doesn’t usually like superhero movies, says that this movie deserves at least 80% and that’s really something
Never listen to professional reviews. They’re often based around old-fashioned principles of film that nobody really cares about these days. Critics don’t know the current audience, and are still stuck in the late ‘90s/early 2000s. That doesn’t sound too long ago, but it’s literally a new generation of moviegoers and a millennial audience that is itching for change.
tl;dr most professional critics are baby boomers who don’t know what the majority likes anymore.