Board Thread:The Flash discussions/@comment-5323230-20171221171957/@comment-26537965-20171225113224

Stryzzar wrote: Even if physically he is exactly Barry, mentally he no longer thinks of himself as such. Basically loss of identity for his old life due to the pain and grief.

It doesn't have to just be time remnants. Oliver sort of had a "that man is dead" moment if I remember correctly. Yup, they drove Barry insane.