Lack of company culture - unless you count a weekly company update on a Friday morning as culture.
No real career development or opportunities for progression. Occasionally they will change people's job titles and mask it as a "promotion" - but they'll often be left doing the same job as before, just with a more senior job title.
Large amounts of staff turnover. In recent months, a lot of senior employees have either resigned, been pushed out, or have been made redundant - including the Head of Marketing, Head of Sales, Head of HR, Chief of Staff, and the COO/Co-founder. All of these were important employees, and none of them have been replaced - with the remaining employees having to absorb aspects of their role.
No work-life balance. Everyone is overworked (and often under-appreciated). The company has given everyone a "wellness hour" each week - but irrespective of this, you have to work a crazy amount of overtime.