My only question is, why are you pondering this now, with the season roughly two-four weeks away, depending on your location?
You've got two choices IMO- 1) Cowboy up, tell the truth, let the chips fall where they may. 2) Stick it out for another season, do your best, try to influence others with your work ethic as best you can. At the end of the season, if you feel the same, then give them proper notice that you are moving on.