I think it’s a universal experience if you’re an engineer who does customer facing work. Every salesperson I’ve worked with has been either extraordinarily stupid or a sociopath who overpromises something that doesn’t exist so they can get a commission, regardless of the fact that the thing they sold doesn’t work and sometimes cannot work. They are a scourge upon this planet and if they all disappeared overnight the world would almost certainly be a better place.

Marketing otoh I just don’t have a lot of respect for. Sure, they lie and use made-up phrases and barely know the product they are marketing in a lot of cases, but they’re company-approved lies so you’re usually not on the hook for making their lies a reality. The salespeople have to bend those lies into a bullshit “solution” first before it personally impacts you. Plus marketing folks don’t have commission, so they aren’t as personally invested in feeding some made up shit to any given random asshole group lead or director, which is refreshing.