Yeah I liked it too. No happy endings in this one. Thanos wins. It was nice that he wasn't a one dimensional villain. He does bad things with good intentions. It works. I'd say Spiderman's demise was the saddest. Got to admit that one got me. Somebody in my row was cutting onions during that scene. We know the writers will pull something out of their asses to bring those characters back. More sequels to be made, right? I don't think those people are dead. Just gone. Another dimension or something. Though it would be something if they left all those characters dead. Something unexpected. But I doubt Disney would give up all that sequel $$$. They have to make up for the losses on TLJ.
Wonder why Thanos bothered fighting after he got the third stone. He really didn't have to after that. If you can change reality you don't have to fight anyone.