By any yardstick that you choose to compare "Thunder Force" too... it's pretty terrible. That said, I just couldn't generate any genuine hatred for it. It's essentially just a group of friends and family messing about.
In a world where enhanced supervillains exist, two school friends drift apart. Decades later, Emily (Octavia Spencer) is a successful scientist working on a way to give powers to the right people, and fight back. Lydia (Melissa McCarthy) has been less successful, but wishes her friendship with Emily had been maintained. On the night of a school reunion, Lydia goes to see Emily at her lab and is accidentally injected with a serum that gives her superhuman strength and resilience. Emily had always planned to be a hero too, so takes the serum also and becomes invisible at will. The pair form a team, THUNDER FORCE, and start to fight back against the villainous forces.
I mean, it's rubbish. It's full of performers who can do a lot better, who seemingly agreed to do this so they could hang around with their friends, which is fine. It's not funny or I should say, it's hardly ever funny - occasionally there's some business with Jason Bateman that made me chuckle. His crab based supporting villain turned love interest is, at least, knowing.
There's a persuasive awkwardness to the whole endeavour though, never quite sure how deep into parody it's going - but again, I couldn't really come to actively hate it. It doesn't really care that deeply, and neither did I. Never again though.