It looks like you're on the verge of quitting anyway, so why not march into your supervisor's office and tell them exactly what you just told us? Ask them if t

It looks like you're on the verge of quitting anyway, so why not march into your supervisor's office and tell them exactly what you just told us? Ask them if there is a position within the company that's better suited for you, or propose to create one that benefits both you and the company. If none of this is in the cards, at least you tried to work it out with them instead of just sending them a notice and going away. At this point you don't have a lot to lose, do you?