Watched it earlier. As most have said, Majors is great as Kang. Some nice visuals, good costume and creature design, but a bit bland and lacking in the humour I'd enjoyed in the previous Ant Man films - although I know a lot of people didn't care for that aspect of the series.
There are possibly a few too many new characters introduced for very little pay-off and some are so underused, you wonder why they cast those people in the first place. Like BP:WF, you feel that 30 mins could have been lost and it would have been beneficial.
I'm a sucker for superhero stuff, and I think the problem is that they are trying to continue a story without some of big-hitters, after two climactic movies that wrapped up lots of the story arcs for so many characters. The new films aren't bad. They are just unremarkable. They all have fun, spectacular moments, but there's not much rewatch value, as we've seen so much of it done better already.
Reading the critc reviews on RT, most aren't even saying it's bad. Just that it's very average.