Despite the characters doing illogical things A Quiet Place II is good. *SPOILERS*
In this movie, you're gonna find yourself asking why the two kids in the movie do really dumb things. For example, the little girl decides to go off by herself because she wants to find the boat, but for some reason doesn't want to tell her mom. I think that if she had just told the mom and the guy about it, they could've planned the whole thing out together. I don't see any reason why the mom and the guy WOULDN'T want to find the boat to get to safety. And later in the movie, the little boy for some odd reason decides to leave the shelter to just "have a look around" even though he's physically disabled due to his foot being hurt from the bear trap.
But if you stop asking yourself why these characters are doing things that make no sense and you just accept the movie for what it is, it's really good.