Jason, short flights often don’t serve snacks anymore, longer ones charge your for small meals/large snacks. Whenever possible I pack a sandwich & snacks to take with me. If not possible, I try to buy something at the airport (not always possible).
On flights where we were delayed after boarding, the extra supply of snacks were brought out & passed around. Did you ask? Sometimes if I mention I don’t feel well & just need some pretzels, some can be found. Pretzels are no longer the standard snack, there are cookies, chips & other strange goodies.
And I would complain about the toilet, rude flight attendant & the lack of a snack under the circumstances. Even if it doesn’t get you anything, an official complaint should be made