Jay Hind Apartment: Post-possession snag list nightmare?

After 7 years of renting and landlords raising rent again, I finally took the plunge for a 2BHK at Jay Hind Apartment. Possession was last month, and honestly, I'm already fed up. The brochure showed a state-of-the-art clubhouse, but it's barely half-finished, and the few usable parts are poorly maintained. The biggest headache though is the constant seepage in the master bedroom wall, and the kitchen fittings are already loose. We've raised multiple tickets for the snag list, but the builder's response is so slow. It's like they just want to hand over and forget. Did anyone else face this with Jay Hind Apartment? Or other builders in New Delhi? How did you get them to fix these post-possession issues properly? Is it even worth fighting, or should I just get a local contractor? This EMI vs rent math feels like a trap right now.