I think I found a better way to describe how I feel about this. The whole time it's like watching a fuse burn, hoping that at the end we're going to get some exciting bang to end off the series. But by the time it gets to the end and you think the firework's gonna pop off into the air, it gives off one measly poot and flops onto the ground.
Which is probably my fault for hoping something would happen, honestly. Maybe I got my own hopes up that even after some of the awkward pacing and the almost stagnant lack of conflict that there'd be something at the end.
The most disappointing part is that Rio could've been great as a source of something, but instead we just see "oh that's the girl matoi is in love with" and then she completely fucking evaporates from the plot. There was pretty much no reason for her to see them or say anything because nothing came of it.