My roommates are fucking pissing me off!

I've worked really hard at getting my 14 month old on a schedule. Wake up at 8 eat breakfast, lunch at noon, and dinner at 7. Bath at 8 bed by 8:30. It's now 9 and because I had to wait until after my roommates gave their kid a bath my kid won't be in bed until at least 11. I have to wait for the water to heat and fill back up, because of course they used all the hot water. Inconsiderate assholes know that I give Jr a bath around this time and they took their sweet ass time giving their kid a bath. It takes me 5 mins to give him a bath and that's because we have a leaky pipe outside that only leaks when hot water is on.