Q.Berm removal/tree death
All trees planted on the berm die as it is heavy clay that doesn’t dry out; not really soil. I would like trees to hide a bad view and get some privacy. Should I just remove the berm which was just a construction dump?
Amending the heavy clay or starting over are your options.
Correcting the soil will ensure a good start to plantings and will be the long term solution for your problem area.
Good luck! These articles will help you get started.
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/how-to-improve-clay-soil.htm
https://www.gardeningknowhow.com/special/spaces/creating-and-using-berms-in-the-landscape.htm
https://www.gardeningknowhow.com/special/spaces/building-a-berm-how-do-i-make-a-berm.htm