If you have critics to tell the Fairphone team, please do so through Support. This is a community forum populated by FP-users like you and me.
I’m sorry to read about your problems. It seems you accidentally installed plain AOSP (also called “Vanilla Android”) without Edge Swipe and the Peace of Mind widget/Last Used/Most Used widget. I’m afraid you will have to update to Fairphone OS manually, to get back these commodities.
Can you find the Fairphone Updater on your phone? Then you can update to Fairphone OS there. If not, here are some links, which should help you:
PS: There is also this topic: