I feel like this should go without saying, but you are responsible for your own triggers. You need to learn how to handle and cope with them. Yes, people can put up content warnings for more generalized things, but you should never expect someone to tag every single one of your triggers. It's not fair to them
It's not just liberals who do this either; a lot of people expect others to cater to them 24/7. Mostly younger people. It doesn't matter whether or not they're liberals