In regards to images, please have a look at https://drupal-community.web.cern.ch/t/d9-embedded-images-deformed/1471. If this is not helpful or you continue to experience issues in this regard, please let us know. As for the fonts sometimes not showing correctly; can you please confirm whether this is always on the same site(s)? If yes, please let us know which. We have had some reported issues of resources not loading correctly; this might be what is happening to you as well. This is not so much an issue with Drupal 9 as it is an issue with the underlying infrastructure.
I am not sure what you mean with “small circle icons”, sorry?