You Rock!
Everything you said totally true, people forget that these are characters in a TV show and take everything too personally. Just like babies grow to toddlers to teens to adults, their behavior changes, their character changes and to a good extent their value system changes. Same thing with relationships too, we may or may not be still friends with our folks from your school or college. We may or may not agree with everything they say or do. Difference of opinion hota hai, changes hote hai, sometimes a relationship survives and sometimes it does not.
The fact that Imlie and AKTs relationship did not survive there is a reason for it, but without going in to the reason for it, lets leave it at ITS OVER & DONE!
People may or may not like Aryan but don't attack the actor or his portrayal of the character, just as Gashmeer may or may not have had any input in AKTs flaws, Fahmaan many or may not have input in Aryan's strengths.
And at the end of the day this is not Kuch Kuch Hota hai "Hum ek baar jeete hai, ek baar marte hai waise pyar bhi ek hi baar hota hai" crap. We live to enjoy life to the fullest, fall in love a million times, people here marry multiple times as well so what's the harm it's their Life, you keep to yours and lets other enjoy whatever they feel is right...