Mumbai v. Delhi

I have been staying in Mumbai from Past few years, I'm from East Maharashtra. I have often seen people from Delhi staying in Mumbai always complaining about Mumbai and appreciating Delhi as a state. They're always comparing although they are staying in Mumbai for so many years.

I have been to Delhi many years back. My experience was not good. I can't say what's the scenario now.

I just want to know, how Delhi is better than Mumbai, apart from Metro connectivity and food (subjective). Never got any convincing answer, hope to get some new insights.