...It's hard to tell how angry and frustrated would you be at that point...
All what you described, was clear to me without your explanation. I know why she is angry. It's the same if someone stands in a shop queue and finally begins to curse and cry aloud that he is tired and they are all bastards who invented those queues. It's clear why the person is angry. Only not everyone would behave like that.

Also, when a woman begins to think "will he marry me, finally?", it means that LOVE somehow has been sidelined already. Maybe there was no even LOVE.

If you can avoid being rude at that point, you deserve all my respect
Of course I can. Be sure. If I love a man, I'll hear him out, at least. Maybe that's an uncommon and outmoded behaviour.
And I would never insult some woman I don't even see in such a disgusting way ("Последний шанс?").

P.S.
However, I often see 'couples' (in life, in the streets, in transport) who have relations, and it's obvious that, pardon my French, they sleep with each other. And they probably really think they love each other. But often, the only one conversation I heard between them shows so much that I say to myself, "It's better not to have relations at all than have relations like that".
I think that people often just "have" their partners, I mean like they'd have a thing which they bought once and just use it and consider it as their "own". That's why Galya wants to kill him when he's not home at 12.00. He just MUST be there because he is her boyfriend and because she put on a new dress!!
That's the approximate way I see it...