There are a couple of things going on here. First off, to render something like that you will need images from multiple directions and probably some oblique ones. This is a pretty complex shape due to its overhanging portions.
Please read the Data Collection Guidelines at https://www.mapsmadeeasy.com/data_collection
It seems you were not flying high enough, didn't have enough overlap and also shot too late in the day due to the long shadows.
To map something 65 m high accurately, you will need to fly many times higher than that.