I recently read for a third time "Mordred's victory" by Jamie Clubb:
Mordred, as described by Jamie, resembles me a lot. This bothers me a lot because I feel like I am like Mordred in most of the things I do; not just martial arts. I only miss martial art classes when there is a snowstorm or when I am sick. I also regularly review at home. I don't give up but I tend to get frustrated when I am beaten in ne waza (ground work) by big guys or sneaky guys (guys who use a lot of cheaps shots) who only show up once a month and don't train when they are not at the dojo. How do you overcome "Mordred's frustration"?