This line of thinking is common but it’s only a self serving implicit bias.
Yes, everyone around you could very well be more stupid or the bigger asshole. This is a perception issue void of evidence either way. The people most prone to poor perception analysis are those least capable of perceiving, which is the foundation of Dunning-Kruger.
For everyone else there are things like measures and accomplishments.
Just an FYI but the foundation of Dunning-Kruger is bad math/charting. The data from the experiment shows that generally people understand how good they are at things. But they charted the data on a bad variable.
https://www.scientificamerican.com/article/the-dunning-kruge...