Low salary and commission (also a very complex commission model).
The strong culture was established when the company was much smaller and they have not adapted this to the fast growth and increase of employees with I would say is a limitation for continued growth. They need to adapt the culture and company feeling to a big company that they today are.
Since they also believe som strongly in their culture they have very little interest in listening to other thought and ideas.
Their is a lack of ambition and drive within the sales organization.
They were very late in developing and pivoting their business to become a SaaS (Software-as-a-Service) provider. This is a big demand from the market and today they cannot offer the same functionality and customization in the SaaS solution they are now developing.