I'm from Perth. I grew up there. It's a beautiful city but I hated it for most of my life. I'm pretty unsociable, I really don't need people other than my family. I have a few close friends, but none of them live close. I left Perth the first opportunity I got.
My wife is completely different to me. She is a social butterfly, has lots of friends. I tolerate most of them, but some I like.
I dragged her to Perth many years ago when we were first married. I had thought it was just me, but she hated it. She was bullied, sent to Coventry by the local snobby Mt Lawley crowd. The only people who wanted to be friends with her had issues. She became depressed and we left.
Been pretty happy living in the UK, and just visiting Perth once a year. We may move back to Perth for a year when we retire. The weather is good if you have a pool.
But it's not just you. Perth people can be bloody weird. They can be surface friendly but with no substance. Not all of them obviously. I have some very good friends in Perth. But I have lived in many places, and I've never met people like Perth people before.
I get where you are coming from. You deserve a medal for sticking it out.