wouldn't be better if you put the wheels more to front so that most of the weight is behind the wheels.It will then tilt and in doing so place less weight on your arms and back - easier pull. You now only pull the cart and not the cart and full weight.
Rod holders - not complete yet
The rod holders on a angle is for when moving the trolley and the fishing rods won't be straight and hit you on the head. The 90* rod holder will be a problem when moving the trolley