Stereotypes are not widely true but I do think a lot of women do widely believe that men have it easy with dating or hook ups. I do understand this may not apply specifically to people following this forum.

But some examples.

1) Average guys in college and in their 20s get laid a lot. - Not true, a big percentage struggle immensely. Some do succeed with a couple women over time or find 1 or 2 girlfriends on their level or lower. But I'm always surprised that women don't realize how few matches most guys get on dating apps. Many of those matches are below the guy's looks level too.

2) Well rounded guys with great careers in their 30s can get any woman they want. - This could even apply starting in late 20s. It's definitely not true. If you have an average looking face, you'll get rejected a lot and have to work hard just for dates with women on your own level. A guy making 400k but 5/10 in looks at age 35 is still going to struggle a lot if he's going for women above 5/10.

3) Older rich guys attract lots of younger women. - Could apply at age 40 and up, except this quite literally is only true if you're talking about being a sugar daddy. I'm sure someone will take a mid 40s rich guy who is very good looking as an outlier example though.