system
Given the following post, respond as if you're commenting on Reddit:
human
Why is existentialism dismissed so often?

Every time the topic is brought up at tutorials or lectures or even in just general conversation, existentialism is just dismissed as 'bad french philosophy' and people just end up making fun of it.

I don't really know why though.
gpt
Sartrean  existentialism had immense influence on post second world war continental philosophers and don't think any respected philosopher can easily dismiss it as "bad philosophy" in that respect. 

Nevertheless it's criticized heavily and challenged by following structuralism movement with a crucial criticism:

Sartrean existentialism is too individualistic and misses larger biological, social, cultural and political framework in which individuals are embedded. Giving all ethical responsility to individuals and conceiving every act as a free choice has unwanted political implications. If we conceive every act of murder or stealing as an individual choice, then responsibility is all theirs and we don't need to change our institituons and social structures which produces these behaviour. 

Even Nietszche is conceived as precursor of this movement, he'd be highly critical of how guilt and anxiety ridden this movement is similar to how Christianity conceives humans as guilty by birth hence in infinite debt and in infinite parole to God and Jesus by just existing. 

The last reason is that existentialism is picked up by pop-philosophy and self-help literature due to its individualistic tendencies and this probably contributes to it's misreputation among "serious" philosophical circles.