Strange, I have always found IKEA instructions to be fairly straightforward and descriptive, in contrast to instructions from other furniture vendors.
Then again I just tested my blog and it has no errors in the console in Chrome or Firefox (except for missing favicon which is not really an error):
https://www.oilshell.org/blog/
There is still a small, useful subset of the web that is very functional. And I've even grown to like CSS after writing 100 lines of it by hand. If you have 1000+ lines of CSS then you stop understanding it, and apparently the browser stops understanding it too.