If you do "pip list --outdated" then it should show you which packages you have installed and that are out of date. Look out specifically for the packages that are mentioned in this error message: requests, urllib3, chardet, charset_normalizer.
You can then upgrade them by doing "pip install [package name here] --upgrade".
I have a similar outlook. I kept complaining and basically the answer comes down to "if you don't like it, leave" - so I did. I understand it's not appropriate for all use cases but Manjaro has been an absolute dream for me so far.
I find the first mistake here to be trying to use WordPress. Maybe it's just because I use it so much (or rather, as a developer, I'm often hired to fix other people's mess and broken code) but it is genuinely my most hated piece of software.
You can then upgrade them by doing "pip install [package name here] --upgrade".