Let's see!
Patchy's stage tends to break people's faces constantly. Try to memorize where does stuff appear, that way you can move accordingly without bullets appearing where you won't expect them.
Stage 5 is less memorization and more straight up dodging... there's not much advice other than "practice more, get better, bomb more".
Eternal Meek is just the same kind of dodging. If you don't feel safe at all, bomb it, you get a bomb item right after it, so your resources will be intact when arriving to Remi.
Also you could upload a replay file so the experts can examine it and tell you what can you do to improve your playing style.