How could Minmay have gotten screwed if she is the one who let Hikaru get away? In the series, Hikaru and Minmay were on two totally different paths. Hikaru and Misa had matured due to the war were Minmay lived in her little world were she was admired, got what she wanted, and basically clueless about the realities of the war. By the time Minmay matured, due to the relaity of the war, it was too late. Misa had left an impression on Hikaru and he realized she was the one for him.
On DYRL, Hikaru made his choice. I think Minmay was more of a crush where with Misa it was more than that. Hikaru knew this therefore he, again, chose Misa. I dont think Minmay was screwed over due to the circumstances of her getting kidnapped by the Zentrans. It was more Hikaru knowing what he wanted. IMO.