Received burger and shake on a dirty plate and cup...

Received burger and shake on a dirty plate and cup. Gave my party of five, one menu to share. Took an hour for us to even order food after we got our drinks. Waiter gave me attitude if I could substitute something off my menu. I didn't want to make it a big deal, I just asked if it was possible. Really mean older Mexican dude. Place wasn't full when we got there so there's a plus for fast seating. Waiter gave us attitude when we didn't leave a tip. Unprofessional. Here's a tip, do your job and wash your plates.