Well, I'll be honest, even though Maya and Josy are my favourite girls, the situation with them did piss me off too but for an entirely different reason.
For me, it wasn't anything to do with dishonesty, that isn't really what bothered me. Sure, Josy didn't tell the MC that the person she was in a relationship with was a girl and that they went to B&R, and Maya didn't tell the MC she still had a girlfriend, but based on what they had both said about their relationships, it was pretty clear that they were on the rocks and that they were unsure of both their relationship and their budding relationships wth the MC, so I can forgive that. They found themselves in a vulnerable spot yearning for comfort and they found that with the MC, which is fine, it was more about what this reunion would mean for the MC that upset me.
I think I maybe internalised too much of this game because what really hit me was this feeling of heartbreak. It really felt like the MC was falling hard for both of them, and I was right there with him because I found both of these girls to be both hot and likable. He was also grappling with having to choose one over the other but he didn't want to lose either of them, and neither did I, and the prospect of losing both of them if they reconciled and got back together hurt like hell. This concern that whatever feelings they had for the MC would just have been fleeting because of their vulnerable states and would be forgotten about when they were together again was tough.
Of course, I chose the path where they're all together in a threeway relationship, but it didn't really make the prospect of him getting dumped by both of them if their love for each other grows stronger than it grows for him go away. As I said in my very first post on this thread, I've experienced heartbreak before and it's not a pleasant feeling, so getting so invested in these characters and their relationship with the MC kind of brought up this feeling again when I imagined how I would feel if I lost two girls that I was falling for at the same time.