Raman and Mrs Bhalla has some disorder since inception?

I have left watching the show so many times and after sometime when i watch 1 or 2 episodes again I become addicted to it but everytime i leave and watch again i find that Raman's as well as Mrs. Bhalla's character changes so frequently and dramatically that it doesn't have any specific characteristic.

Raman - I mean at one time Raman is so loving after few episodes he is totally opposite. if he is angy with someone over something, he will think that person as his enemy after sometime the same person does some drama he is totally in love with him/her. At times he seem to be so dumb to me that simple thinks are there which he can't notice.

Mrs. Bhalla: I have never seem a character as her in Television till date. She is so loving yet so stern. One moment she loves ishita sooo very much and could go against her own son for Ishita & other moment she hates her to core and forget all the gud and sacrifices done by her.

I can never understand how can anyone just forget what all Ishita tolerates for the family and keep on humiliating her and also Ishita is a one of its kind character who never show any self respect and takes all that comes her way.

Anyhow its just a serial and that too typical EK, but still whish to see some logic and positivity (more positivity than negetivity)