I think the truth is Echo was made at a time when they were remaining cagey on connecting to the prior Netflix stuff which is how Fisk running around out of prison in 2021 with Matt not specifically going after him happened. Also, while they bring back him killing his father, the details aren't exact. Echo seems to imply he was in his bedroom and left the room to go after his father when in the show he's already in the same room as his parents. Also, the "Rabbit in a Snowstorm" wall is in said bedroom rather than an open area of his family's apartment as we see in Daredevil. It's like they wanted to take certain elements from his Netflix history without caring if they fully lined up. I feel like restructuring Born Again is when they decided to fully treat Netflix as 100% canon leading to the addition of the shows on the Disney + timeline and hopefully explaining details like the Echo 2021 scenes to make everything line more up.
As for losing someone he loved, it could be a reference to his mother or Vanessa being blipped.