The bottom layers stick but my prints didn’t form/fell off at the supports?

It can be due to incorrect exposure setting for your normal layers. Try to increase exposure time.
You may need to increase support tip size and depth in your slicer settings.
Also you can increase support density or to use medium and heavy supports.
It can also be due to the orientation of your model. Try to angle your model and minimize large surface sections.
If your model is large, then hollowing the model is essential.

Very useful tips in this article:
https://ameralabs.com/blog/6-tips-3d-printing-supports/