Carpet area truth: A post-possession reality check

The actual carpet area in many Ghaziabad projects is a shocker after possession. I just moved into Mass Build Well Livin' Life a couple of months back, possession was in March. Honestly, floor plan brochures look so different from real life. Carpet area feels way smaller than what was projected, bilkul tight lagta hai. Also, the noise from the main road is constant, didn't notice it much during site visits. Air quality bhi utni achhi nahi lagti. Has anyone else felt this post-possession? What did you do?