Insulin doesnt need to be refrigerated constantly? You take it out of the fridge and put it with your stuff and use it til
A) it runs out
Or
B) 30 days pass.
The fridge is for unopened insulin so it lasts until you need it.

Its Australian.

Yeah, again, just don't be a dick and show some basic human respect and you're good.

Most people don't actually get too salty unless you're a dick about it.
So just don't be a dick and you're good.

No it will happen the same way you learn their name. "Hello, my name is [blank], I go by [blank] pronouns" if they think you should know them. It's really not as complicated as you think. Also, believe it or not, some people won't think you're a homophobe if you get their pronouns wrong. They'll usually remind you, but they understand it's confusing.

You don't have to go out of your way to figure it out. If they tell you a pronoun, use it. Or if they don't, it costs literally 0$ to use they/them for someone whose pronouns you don't know or feel confident using.

I don't think so. But it's a good meme.

Then just say they don't interest you or that you have nothing to say.

Sounds like you solved the problem by unfollowing.
there's really no reason to complain if you can just do that.

But maybe they looked really cute in it, maybe they don't always feel as cute as they did in that picture and they wanted to share. Really it's not a big deal, no one is forcing you to pay attention to them.