As for what the point of him getting drunk is - likely just to show that he’s in a bad state after losing Abhir and reiterate how badly he needs his son to feel happy.
Same way they spent so many epis showing Ak’s pain when she felt she had lost her son. It just goes around on a loop for writers ka current parent of choice.
Waise is he going to get drunk in BH or some other random location where Ak will find him magically somehow? Lol
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