I wholeheartedly enjoyed the Loser Only Cut, the way you made the scenes from both movies flow together really worked well in the edit’s favor. If you are going to make any changes in a future edit, I’d suggest moving scenes back to where they originally were or making use of deleted scenes if you have a copies of the film that have those.
For example, the scene where Henry gets abused by his dad in front of his friends before killing him a scene late should be left where it was like in the original film. And if you want to show Henry’s abusive relationship with his father, there’s a deleted scene that establishes this. Otherwise, this was pretty good for a first fanedit, and good luck with it in the future!