Stuck in a Dwarka Expressway project: My RERA frustration

Honestly, I'm kicking myself for not digging deeper into RERA compliance before investing in a project near Dwarka Expressway. My builder's been pushing possession dates for months now. I thought RERA was our shield, but it feels like a toothless tiger when you're actually trying to get compensation for delays, especially with builders like Pioneer Urban or similar to issues at M3M Heights. Has anyone here actually had success with RERA complaints for significant delays? Or is it just a lengthy process with little real outcome? Also, what critical title verification steps did I miss that could have flagged this earlier?