I basically agree with every single word in your post. I have no issues if Riddhima choose Armaan. When Sid Told her too, before she signed the divorce papers. after she signed the divorce papers, heck...even during the time where Armaan was like. go to Sid if he makes you happy. But Armaan asked and Sid asked and she went to Sid. If you're gonna say that's societal pressure. Fine. For the sake of argument I agreed. After the seven months...... though she could have said No. But instead she's like. Remarriage! Great Idea! So.....what is the justification in choosing Armaan? All of a sudden she realizes she has feelings for him? She was having protective feelings before...why didn't she realize what they were then??
As for Armaan. Wow. The one character i really reallly loved. Is being butchered. From his prospective..its his love etc etc life etc etc. But. This is not his initial reaction. Its a reaction that should have come when he first realized....the reaction we got was hurt, and anger, and then we got "lets get them together" because thats what made Riddhima happy.
And now, in his mind, he's saying, Riddhima's happy, but I'm not. So how does that lead to him going to her? Are you going to tell me this is right? How is this respecting the love that they had soo much for each other. For Gods sakes do it after she gets a divorce. Or move on. Plain and simple.