I'm sorry that you're annoyed by my simple mistake, but that's your problem.

And and

I feel like it's really hard for people who learnt after smartphones. When autocomplete gets it wrong they don't notice

Obviously the way of remembering which is which is "you're" is short for "you are" (hence the apostrophe) and "your" isn't. But they also need to practice while keeping that rule in mind

English as a second language people seem to do better than first language users

"You're" = "you are" when "Your" indicate that own something