I think I mentioned the Dragon Kings?
Okay, let me phrase this somewhat differently.
All other groups' patrons are not given to be super Compassionate, righteous, etc etc. Sol is the only one called out as such. So, saying 'why do Solars have this expectation when no one else does' is missing the big obvious point where only the Solars have a
reason to expect that. The Dragon King's worship of Sol is, from what I recall, slightly different, and they wouldn't really view him the same? Even setting that aside, the complaint is that if Sol is so super Compassionate, why doesn't he help Creation/unfuck Heaven's bureaucracy, etc...
So the fact he's also patron of the Dragon Kings just adds 'why doesn't he help out the Dragon Kings' to the list. It doesn't somehow change how his given characterization and the state of the setting contradict each other.
Most people's solution is simply: Sol isn't a perfect super good guy. This removes all complaints, it also means the Solars wouldn't have the expectation that Sol would intervene.
Well, the real answer to why I said 'Solars' is because I briefly forgot about the Dragon Kings, since they are, essentially, completely irrelevant.