I think Archu loves Manav, but at the same time she doesn't believe him... she feels it was her mistake to have fallen in love with him.. she thinks it was wrong of her to have fallen in love with such a disgusting man.. so in front of others and even to herself she claims that she hates him like crazy.. but again dil hai ki manta nahin..!! No wonder her sisters can easily see through her.. but I am shocked that aai who claims to be the closest to her cannot understand her..!!
She is basically a cow who will eat out of everyone's hands... so she easily accepted when ajit accused manav, again she felt he cud not be the culprit, but when her family members accused him and did not believe him, she stayed quiet and forgot the whole issue as if it was nothing...
So if you analyse it till here, archana comes across as a pathetic, pitiable, wriggling worm like character who does not have confidence on her decisions or the strength to go against people.
But the creatives ruined this aspect the day she shouted at savita in satish's defence and also when she accused Manav of trapping and insulting her in public (the day she signed the divorce papers).. where did she suddenly get the strength from and how did her mind cook up such a story of manav planning to insult her in this manner... she never had faith on her decisions before this..!!
and now the third twist in Archana's character is that she is coming across as as egoistic and ungrateful wife who despite knowing that her husband saved her sister's respect and even now cares about her family, will not even give him the benefit of doubt and instead sing praises of satish..!!
So basically the creatives have been trying to show how Archana's character and her moods, her opinions about people change with time and according to the events in her life.. sometimes good sometimes bad..it does happen in real life too... unfortunately they have done a poor job out of it.. cos they have ended up making it one of the most hated ones in the show.
So if I have to define archana I wud say... (as we diagnose here in mbbs)
1.) She is a cow.
2.) Unlike a cow, she doesn't come under vertebrata cos she doesn't seem to have a backbone.
3.) Diagnosed acephalic since birth (no brain)
4.) However she has an overactive limbic system (emotional brain) that leads to making wrong decisions most of the time..
5.) Hyperactive lacrimal glands (tear glands)
6.) Congenital malfunctioning of the larynx (voice box- can't speak when she needs to speak up)
7.) Seizure threshold low with respect to Manav (On seeing him, she runs away, gets hyper at him, doesn't tolerate him, can't bear to listen to him, even shouts and accuses him)
8.) Other than all this she is perfectly normal...;D