I had no sympathy for the bugs.
Seriously why does this movie want us to feel sorry for a swarm of bugs (that attacked us first!) when the entire human species is at stake? When it comes to intergalactic war it's literally us or them. That's not a hard choice to make.
And it was silly how they were all being a bunch of crybabies after realizing they had just won the war that they spent the whole movie training for.
I know it's just a kids movie but it was fairly enjoyable up until the end.