Regulated exchanges in crypto industry can work without any issues just like stock and forex broker. But crypto industry is all about the greed and the manipulation. Be it mt gox, blockfi or many other exchanges out there. All of them want to tap out as the world wants to move faster to the growth.
Wazirx too pulled out an exchange hack and told the customers that they lost the money. So now under new policy that 60 days they can't file the lawsuit either.

Problem was that their many wallets had the security breach and it seems like the attacker came through that and ended up destroying the exchange for the users. In short the rugpull happened by blame going to the hackers. Which also means that there would be some really strong and serious consequences for the users who kept their funds with the wazirx.
Sure they can play like Mt gox and may later refund the money and all. But there seems to be no chance of that happening this year. And also this goes to show that not your keys not your money. Never store your funds in the wazirx. Not even in binance too. Also if you do keep funds see if there is insurance for stocks and crypto. Many such insurance products are out so just in case.