Dasnac Burj Noida hidden costs are a nightmare

Just got possession of my 3BHK in Dasnac Burj Noida last month and honestly, I'm already regretting it. Builder ne toh maintenance charges aur other hidden costs ka pura game badal diya. Jo rental yield forecast kiya tha, woh toh ab bilkul unrealistic lag raha hai. Kya ye sab ke saath hota hai? Kaise deal karte ho aise situations se?