Cloudflare.com, dash.cloudflare.com, and many sites that uses Cloudflare - it is all slow for me.
Be it Wifi, Ethernet this happens. And only for Cloudflare IPs, not for others.
Jio issues have been reported from time to time, the issue you’re seeing sounds similar to PingTimeout - Can't Connect to Cloudflare network - #4 by moldingworld