"Sounds about right." There’s a resigned air to Remus that makes Sirius’ blood boil, because Remus is acting unsurprised, like this just happens, like it’s expected, like it was only a matter of time. And yes, Sirius knows Remus has trouble keeping jobs, but he assumed it was for good reasons, like him missing too many days or continuously being unable to perform his duties or other perfectly normal reasons Sirius assumes people lose jobs for. He did not think that Remus had been getting fired just because his boss couldn’t treat him with human decency.