In the future, I recommend not giving two week's notice for hourly labor like this. Two week's notice is a courtesy that makes more sense for salaried workers in specialized roles. The type of roles that will take more than two weeks to fill. If you're working hourly labor at a restaurant, or in retail, or construction, your job takes between two minutes and two hours to fill. If your employer has already demonstrated that they don't treat you with courtesy (everything in your story points to this) then you don't owe them any in return.
I want to expand on this. More generally, when giving notice one should be prepared for their employment ending immediately after they give notice. I think my employer will pay out two weeks, but they've definitely escorted people out within an hour or so of them giving notice (but paid out two weeks). One coworker gave 24 hour notice, as in "today is my last day," because he was concerned there would be a gap in his family's health insurance. He was later hired back and was recently given a company award. There were no hard feelings.
I gave a two weeks notice at my last job, then they started treating me without respect because I was leaving. So I told them that I was not coming back the next day and it was due to their treatment. Called my new job and they let me start early so no problem. Not everybody gets to do this of course, but it was satisfying.