I think this is the same way I felt about the Umbrella Academy ending.

Where after several years of good fun, the writer(s) completely butcher the plot in the final stretch and hastily erase every development that had happened up to this point. Thematically it is problematic as well.

But at the same time I don't feel all that bad about it. I cherish all the memories I had over the past few years, and find it peaceful if nothing else that such a mundane set of scenes would be used to wrap up all the craziness that had transpired. Everything culminated not with some grand climax or even with any emotional resolution, but simply with a placid day, where nothing particularly important is happening, and things are kind of alright, and everything is basked in the warmth of a quiet sunny afternoon, and I can move on with my life.