I think a lot of it is lack of chemistry, but Milton is definitely holding the ball and throw AT open receivers instead of throwing receivers open.
I think that was evident on the hail mary. He waited until everyone was crowded in the end zone and tried to aim for a guy. You have to throw it before the receivers get to the end zone, and let them run to the ball. They have the advantage on the move.
Overall, some good things early from both O and D. When the head coach took over play calling they started exploiting mismatches on D and controlling clock. Defense has to be better.