I think it would be wise for you to not think of your experiences as fully representative for both types of employment. There is innovation and movement in regular companies outside of the startup-bubble too. And there is enough staleness and ignorance in the startup culture too.
What I am trying to say with this is, that this is not a starup-culture vs regular companies thing, it might be just that specific company that is not right for you.
I think it would be wise for you to not think of your experiences as fully representative for both types of employment. There is innovation and movement in regular companies outside of the startup-bubble too. And there is enough staleness and ignorance in the startup culture too.
What I am trying to say with this is, that this is not a starup-culture vs regular companies thing, it might be just that specific company that is not right for you.