I think this was uploaded around the final chapters of Citrus that were being released. I just binged the whole manga to the end so many years later and I still feel so much frustration with Mei, so I'm glad I'm reading comments reflecting other people's frustration with her character.
Yeah Mei gave up on their relationship to pursue her own ambition. She lost faith Mei x Yuzu and tried to abandon Yuzu completely. I really hated Mei for such a long time. I agree I wish Sabu wrote a rival to Mei that required Mei to actually "work" for Yuzu, maybe another gyaru student who took a liking to Yuzu and whose personality matches better with Yuzu.