Dev and Sona were quite compatible. Dev was this cut and dry guy who really thrived with Sona. He learnt the art of giving gifts, remember the puchka. Even the scenes during the courtship, where they fought and realised that talking was important. Dev bought gifts for everyone for Diwali which was Sona’s idea but he bought gifts for the Boses too without any prompting. Dev and Sona got along well, they were friends first. Both did realise that they could rely on each other’s opinions. Even before the reconciliation post leap they worked well together (minus Ishwari).
This Dev doesn’t even feel something is amiss in his marriage. Even a Season 1 recap could have helped the writers, not that they care much. Sona doesn’t want to confront him out and out for the fear of the pills. Even Natasha would have been a better person to take ideas from. Poor Elena he doesn’t even give her enough bhaav to ask for any ideas. Devs sisters are anyway second class citizens, no one even mentions them forget their presence.
Conveniently the entire fandom has a new punching bag in the form of Sanjana. No rhyme or reason to explain her infatuation, except for the fact that Ishwari will get away scot- free yet again.