I don't think the problem here is that he looks down on her job or her income, he is clearly in no position to do so! So the point that he would have objected on her doing a job makes no sense. The major problem here is that- according to societal gender roles: HIS money is THEIR money and HER money is only HERS! And this can be a serious issue considering their situation. Yes he himself proposed that he would do the rent and groceries and she will have to take care of the 'rest' of the things, but you can never say he is too happy about using her money. And he constantly tells how they have to manage in his salary without bothering to include hers in the sum total. And I feel it's not only his fault, his parents have instilled this in him and sharjeena's father looking down on him and people judging him all contribute to this. But he has to understand that it's not them who live with him, who are ready to sacrifice their everything for him, who are ready to face any challenges in the path just to stay with him...it's HIS WIFE! It's THEIR life, THEIR home.
And when it comes about self respect, even Sharjeena was constantly insulted in his house, but she still managing to stay in the house, doing the household chores is often defined as "achi bahu", with people generally not being concerned about her self respect. If she could listen to all of that, can he not manage to just take a loan from his father in law without bothering about what he thinks of him. And if not that, atleast count her salary in the sum total! Things would have different if Sharjeena didn't earn, I am sure many of us, I know I would have, talked about how she should contribute if she is educated and skilled. But the gender roles are so deeply rooted in us that most of the time we don't see if there is anything wrong with it, and because it is so normalised we find reasons to defend it and him being the good human he is-this itsy bitsy detail takes a backseat. But however hard we try to deny it, or cover it up in sheet of 'his love and responsibility', it won't change the fact that he sees the need for himself to be the provider.