Online ratings especially Blitz & Bullet give poor guide to actual playing abillities


playing blitz can help you with establishing playing quickly and intuition but i agree to really improve you should take your time on longer rapid games and study endgames

On the latest posting I can see the reason for not agreeing as he has a 1900 rating OTB and as such will know his Endings and Middle game setups, this is learned during ones over the board play which was the the original reference as if you only have ever played Blitz or Bullet chess and not over the board you cannot expect to have complete knowledge in your Endings as I learned in my early years with my uncle.