Yup, it's a Raman criticism post. And, if you all think carefully, this discrimination of him is to be criticized.
I hope, you all remember the episodes when Ishita came home late as she was helping Simmi-Param. Raman shouted at her, and even pointed to her character. He was about to throw her out of the house just because she came late and she was sitting with two men. And, that too when he dint love her. Okay, am not going to this loving arena. My ques is, dint he think about Ruhi? Dint he think how Ruhi will live without Ishita? That kid can't even sleep, dress, brush without her. Din he think for a second at least about this?
Now, a kinda same situation occurred to him. He is saving witch for Adi. Where that night he dint think about Ruhi for a second except when he said the Ruhi will be spoiled with Ishita, here, he is taking 2-3 days to think for Adi only. And, who know how many days he will just think about Adi and leave Shagun free.
Raman was about to punish Ishita for a tiny mistake and also he was about to make Ruhi's life hell without Ishita. Now, what happened to him? Why is he playing the opposite in case of Adi or should I say Shagun? He hated Ishita that time, he hates Shagun this time. So, why the discrimination in Ishita-Shagun and Ruhi-Adi?
Just because Adi is first born and Shagun is first love? Everything else what these two did to him to worsen his life, is nothing infront of this first impression thing? How the hell can he discriminate in his own blood parts?