Just try your best and actually listen when someone gives you well meaning advice. Some people learn content slowly, and others like myself tend to run around like headless chicken due to overstimulation when learning new mechanics. So long as they keep plugging away and show a genuine desire to learn I will never consider them bad, even if it might take them days or even weeks to nail the content.

About the only times I will consider someone 'bad' is if I know they aren't trying or even willing to care to do so and are selfishly holding other people back. I had this in the first FC I joined when I came to Balmung, where a married couple basically constantly sabotaged progression for everyone else because they thought it was funny and didn't care about getting the clear. It turned me off progressing content for a long time, even when they left and I summarily moved to another less toxic FC.

That and when someone goes into content thinking they're Hydaelyn's gift to mankind and then proceed to make the run hell on their teammates due to their ego.

tldr; be a decent human being and you're already a good player in my eyes.