Thank you all for your answers. I understand your opinions wholeheartedly. I can see how Mei seemingly regressing throughout the story could be frustrating. I, however, don’t see it that way.
Mei clearly knew she was treating Yuzu terribly throughout the second half of Citrus, as she was basically leading her on he entire time they were together. Then, in Volume 10, the two were essentially broken up without any explanation, which caused Yuzu immense pain. However, she was willing to forgive Mei and get engaged to her in he blink of an eye. A plot point which, I think we can all agree, was rushed.
Mei, however, seems to know this and wants to make up for basically lying to Yuzu the entire time by taking their relationship slow and steady, and giving Yuzu the proper love she deserves. Of course, this is complicated since she has to balance being lovey-dovey with being a strict and upstanding Student Council President, and eventually the Chairwoman of the board.
Thankfully, this chapter finally acknowledged that their time as youths isn’t going to last forever, and now it seems like this arc is going to revolve around Mei learning to put Yuzu before her responsibilities, if that’s even possible. (It’ll be interesting to see how Sayaka plays into this all this...)
All in all, I understand everyone’s frustration with Mei being built up, then falling back to square one and having to essentially start over again, but given how she feels that she never treated Yuzu fairly to begin with, this path seems perfectly natural for her. Or maybe I’ve just been blessed with endless patience or something XD