I finished it yesterday and honestly I was pretty disappointed. So many plot holes, the writing felt so rushed, the ending doesn't really make sense (since the military would not have just let them go after they, mainly Nancy and Hopper, killed so many soldiers). There were some good moments like the flashbacks for example I really liked them, they make me want to rewatch the previous seasons. It just feels so underwhelming. There was such a huge buildup just for it to kinda crash down... Overal I don't hate it, it's just kinda frustrating that it feels like they didn't put that much effort into it.