@Mr grump
Starlight told her
not to touch her saddlebags, she didn’t listen, so the bottle broke, causing the anger cloud to spread.
Also, Trixie suggested the use of a memory-wiping spell in that episode, which
Starlight shut down.
Trixie admitted to using her to get back at Twilight, so… her fault.
In To Where and Back Again, that was
entirely Trixie’s idea. Starlight
tried to talk her out of it, Trixie wouldn’t listen.
So… none of those examples are valid. They were either mostly or all Trixie’s fault.