There is rarely a shortage of things that a school could do better. Maybe the garbage cans in the restrooms are too small and are perpetually overflowing with trash or the garden started a few years ago has been overrun with weeds. Your campus may need better signs to help people figure out where they are and how to get to their destination or the dining hall doesn't serve enough fruits and vegetables.
These are only a few examples of things that, in the big picture, are often overlooked. However, their presence is a detraction from the overall experience. These are the little annoying things that, if improved, could make a larger impact on the life of the school.
So, here's a proposition. Find one "minor" thing that annoys you at your school and instead of being annoyed and complaining about it, empower yourself to lead the effort to fix it. Take on a project that falls between the cracks, doesn't necessarily have a formal way to address, or is thirsting for attention.
(FYI - I got larger trash cans in the restrooms across from my office)
Random acts of school leadership are not only necessary, they are welcomed - especially by those in formal leadership roles who do not have the time to devote to some of the fine tuning that often gets overlooked.