RERA registration is just a formality for builders, right?

RERA registration details verify karna Paradise Green Plaza jaise projects ka itna complicated kyun hai? I bought a 2BHK in Sector 137, possession was in April. Ashiana Builders ka track record okay laga but ab title clarity ko lekar tension hai. Agar builder ka past legal issues hain, toh meri investment ka kya hoga? Exit options pe bahut farak padta hai. Has anyone actually seen RERA complaints result in quick action for investors here?