I only watched the first one and it seemed pretty rote, but maybe it goes somewhere good in later episodes. I didn't think it was particularly bad or anything, it just has a lot of high-quality competition atm.
The notion that superheroes have been around for ages and now a generation of kids have grown up accepting them as part of their cultural landscape was a pretty tired setup when the Invincible comics started, being pretty much the default backstory of every single teen superhero comic made by Marvel, DC and Image since the early 1990s - but Invincible is explicitly a story about fascist ubermensch, so the cartoon is arguably now relevant where the comics weren't, now that the MCU has popularised the concept of genetically-perfect body-armored, US military-approved interventionists and the dynasties they build despite existing within democratic entities.