If you're leaving comments about style on PRs then your tooling isn't doing a good enough job. You should have a linter and a formatter configured, everyone should be sharing the same config, and they should always be run on a prepush hook (or earlier... run them on file saves if possible). Badly formatted code should make the the push fail so the dev has to fix the problem before they can open a PR. Force pushes and skipping hooks should be vigorously discouraged. That way badly formatted code shouldn't make it to the repo and your PRs can focus on more important things.

Obviously this is really hard to implement on a project that's old and has thousands of linter errors. If you didn't set it up on a greenfield project right at the start you can't really complain too much though.