Standard issue asshattery include things like:
- Paper-thin mock up demos of a product being misrepresented as actual finished sale-able product. Sorry but the V in MVP stands for viable.
- Impressive people are touted as employees, even co-founders, and when you go talk to them it's news to them. Maybe they had a conversation with said founder once and expressed some interest and suddenly to investors and others they are the CTO. Sometimes this arises from the founder(s) being so narcissistic that they simply assume that anyone would of course feel privileged to join them. Why wouldn't they?
- Company/founder has sales/vendor relationship with other companies and misrepresents those products as "theirs," implying that they actually own them. In one case I saw rebranding without permission, which is flat out fraud.
- Signups/trials/downloads misrepresented as active continuous users or free users counted together with paid users.
- Lying about educational or work background. A skilled blowhard will do so in an ambiguous way, e.g. "went to MIT" means "attended one workshop there and read a lot of open courseware."
- Products that would violate known laws of physics or proven mathematical theorems. (Or sometimes even grade school math...)