Sankalp Shangari is also the founder and CEO of LALA world. COSS is his new project and already started getting bad reviews as mentioned by erikalui. India is not a great place to start businesses around cryptos. So I usually stay away from any Indian project instead of supporting them. But COSS is registered in Amsterdam as I can see in their website so they won't necessarily come under the purview of India government it seems.
BTW, COSS requires KYC as well. Look at the below link,
https://cosssupport.freshdesk.com/support/solutions/articles/35000103546-kyc-guideThe team is based out of Singapore so don't worry about that. In terms of KYC it is only required if you plan to transact more than 2 BTC per day or trade Fiat on the exchange. So if you're just a crypto to crypto trader there is no need for KYC.
I can confirm I have been getting daily income now for past 2 years so the exchange is very far from a scam they are actually a very legitimate project.