I want to tell my girlfriend to change her phone home screen/wallpaper. Think she will listen?
What makes you want her to change something on her phone?
She changes her home screen background every 1-2 days.
Controlling people seek power over others by reducing their partners confidence and stature. Offer your partner some freedom to express herself and don't let the little things bother you.
I don't care what partners do. Women should comply with what I want. It's a man's world.
You won't be with someone much longer if you are as controlling as you sound. Be a good person and let her live her life like she wants to do it.