I watch shitty movies so you don't have to
Avoid Thunderbolts. It's boring as shit, the battles are meaningless, there are no characters to really root for. I think they were going for a Gunn-style misfit squad but like Suicide Squad, they forgot plot and missed opportunities, and they didn't even have the courtesy of featuring Margot Robbie in hot pants.
Oh, and no Red Hulk and no Punisher, so the casual murder they feature almost to kick off the show feels cheap and out of place.
I'm baffled as to why anyone would care about this, just avoid it. Fantastic Four by comparison is Citizen Kane, this is meaningless dross left over of a clunky-ass Phase of the Marvel Cinematic Slophouse post-Avengers when they closed out the Starlin Thanos stuff. It's been mostly a shitshow from there, and I include their licensing shitshow version of Spider-Man, and this is no exception.