Noida Reality Check: Things I Wish I Knew!

Just moved into my new place in Sector 93A. Possession was in March, but things nobody told me! I'm wondering if anyone else is facing similar issues. The rental yields they advertised vs. what I'm actually getting are miles apart. Has anyone managed to achieve the promised 4-5% ROI? Honestly not sure if I should've gone for under-construction property with Sarthak Builder instead, maybe the pre-launch discounts would've been worth it in the long run? Is it worth considering Greater Noida West? My friend says prices are lower there. Also, should I be worried about this Jewar airport impact everyone keeps talking about? Not seeing much of a price jump yet, tbh. Kya karu?