I know :re gets all this shit, and while it wasn't the masterpiece we all expected it to be, I got to hand it to Ishida for being able to pull through despite everything that was going on with him and his personal life.
Now, this is the second time I read this. The first time around, I was confused as hell after the first half of the manga. I only got that Kaneki had married Touka, he went crazy, and Hide was somehow still alive. That's it.
However, after my re-read, things start to make sense. I get a feeling I understand better what Ishida wanted to get from this, what he wanted to deliver. The names start getting a bit more clear, and the fight scenes make more sense. While I can still agree that there was wasted potential, the world of TG was getting really big and Ishida, in his current state, wasn't able to deal with it all. Still, the new characters he introduced, especially the Qs, were all very interesting and fun to see develop. It saddens me that the manga had to end in such note, but at least we *got* an ending, which is an achievement in of itself.
I'm thankful to Ishida for creating this story and all the characters that we saw grow and change throughout all those years. I hope he can rest after all his hardwork. In the meantime, I still cherish the journey he pulled us in and I will forever consider TG as one of my favorite manga series, and I hope people don't shit on the story or the author because of the way it ended. He had his reasons and we should be thankful for what he accomplished.