". . .hard to not become bitter towards dating at all in the future."

That is how. It's the future and you can't know what it will bring. Focus your anger (bitter isn't "worth" much) on the behavior of the present guy and how to recognize it in the future should another guy act in a similar (not "same" because it won't be the same guy) manner. Think of what you have learned, here in the present, and figure out a plan for possible action if you come across such behavior in the future. That's what anger is for, to help us orient and plan so we avoid situations we haven't liked previously :-)