There's no style guide for internet comments and you don't know anything about another poster's potential second (or third, or fourth) language competence, disability or deficits, accessibility aids they are posting through, etc.

If you can't handle it then you'll miss some content, the same way you'll occasionally see comments in here posted in a language you don't understand. Do what feels reasonable to extract the information, or just accept that you won't and move on. I guess downvote if you really wanna.

Socially enforcing a high standard of what is essentially typesetting does nothing but discourage people from contributing who may have thoughtful responses but not the time or ability to edit them to your standards.