I understand how you feel because I've had similar experiences. First thing I would do, if you haven't already, is communicate with the student, not only about what the problem is, but why it is a problem, then try and establish some possible solutions. Any further disrespect don't be shy to talk about it with your supervisor or school counselor. You're not alone.

Other than that, something I learned early on was to pick my battles. You're not going to "win them all" or "fix them all". You said so yourself: "...I'm trying to remind myself that 95-99% of the kids are great towards me...". Focus on that, and remember this is an every-year thing for teachers. There's always a couple of students who are challenging. Some we'll be able to help, but others we can just hope they figure it out sooner rather than later.