Is there any option to sort the list of modules on drupal.org by the number of issues?
1 Answer
No, there isn't.
The number of issues isn't really relevant because you need to see what type of issues there are (cosmetic / blocking), how actively the module is maintained, how many maintainers, etc.
Big modules can have a lot of issues, but if they are frequently updated it's no problem. If a module has only one (blocking) issue but it isn't resolved due to lack of maintenance than it's worse.