Builder-Buyer Agreement ke Hidden Traps in Greater Noida

Since last Diwali, I've been seriously hunting for a 3BHK in Greater Noida, especially around Noida Extension for my kids' school. My wife's priority is a safe neighbourhood aur achhi amenities. We saw a project, Daniya Azad Residency by Skytech Group. Builder-buyer agreement mein kuch clauses dekh kar toh dimaag ghoom gaya. Unka penalty for delay clause builder ke favour mein zyada tha, aur hamare liye kuch khaas nahi. RERA registration number check kiya toh usme bhi kuch ambiguities thi. Not sure if I'm overthinking, but it felt like they were trying to hide things. RERA complaints file karna kitna effective hai actually? Kya kisi ne builder-buyer agreement mein aise red flags dekhe hain?