My advisor has only met with me twice in the past year. Is this enough cause for me to change advisors?
Yes. You are early on in the program and you should begin to work on changing advisors if you are not thriving under this advisor. When talking to new potential advisors, you can ask how they would handle the question of evaluating your performance given the switch. They can help to “go to bat” for you with their colleagues if questions come up about your performance. They may ask you to wait until after comps to officially switch if there is a chance that the switch could affect your passing. Usually, provided you pass comps, your performance is evaluated mainly by your advisor so this should not be a big issue.