If you expect Methods to be your worst subject, the difference it will make to your study score is fairly negligible for an 80s atar. For example if you get a study score of 30, it will add only three points to your aggregate - that's the difference between a 40 and a 43 in one of your top four subjects, or the difference between getting four 37s and getting a 37 and three 38s. If you think that dropping methods will allow you to make at least that kind of improvement in your other subjects (if you reinvest that time into your other subjects it probably will), dropping methods isn't a bad idea atar-wise.
If you want to keep doing methods, I'd suggest getting a tutor. If you're going to drop, just make sure it's not a prerequisite for any of the uni courses that you might have in mind.
and hey, don't be too worried about everyone else. I assure you, everyone who cares about doing well in year 12 is internally panicking in one way or another, so just focus on yourself