Builder agreements are a legal trap for buyers

Dwarka keeps coming up every time I shortlist something. Fed up of renting, finally taking the plunge and looking at a 3BHK, maybe Apex Buildcon's Home Making Smart Floors. But honestly, the legal due diligence part is giving me major anxiety. I'm trying to verify their RERA registration and track record, but the Delhi RERA site pe details check karna kitna mushkil hai. How do you guys actually confirm a builder's legal history beyond just the registration number? Any red flags to watch for, especially regarding past project delays or title issues? Also, the builder-buyer agreements — are they really just full of clauses favoring the builder only? What are the absolute must-check points before signing, so my investment is safe? Don't want my hard-earned paisa stuck in legal mess.