This is a good point, I think the better point to make is that when you have a big company that's been around a while there have been a lot more opportunities f

This is a good point, I think the better point to make is that when you have a big company that's been around a while there have been a lot more opportunities for things to go wrong, which leads to unhappy current or former employees, and then bad reviews on sites like glassdoor. A company like Airbnb hasn't gone through like 1/100000 of the pains that Google has gone through. Think of all the products Google has built (some successful and some not), think of all the economic environments Google has had to go through (2000 meltdown, 2008 meltdown), think of all the employees who have worked there (there's 60k now, but google has probable cycled through 5x that amount). Airbnb has made like, one product? Through a relatively small stretch of time, while probably still using most of their original employees. It's an electric time to be at Airbnb no doubt, but I wouldn't trumpeted them as the best place to work just yet.