Just moved to Sector 33, Noida - reality check!

Sector 33 mein just shift kiya hai last month. Bayaweaver Ltd. ke project mein possession mila in March. Honestly, things nobody told me! Maintenance charges are way higher than promised. Rental yield ka jo sapna dikhaya tha, it's not even close. Advertised yield was 5%, but I'm barely getting 2.5%. Anyone else facing this? Also, under-construction property sahi mein better hai ya ready-to-move? I chose ready-to-move thinking safe option hai, but now I'm wondering if I made a mistake. EMI is killing me! Has anyone else felt this after moving in? Am I the only one who feels misled by the builder?