The product. What you're selling is not unique, and it certainly is not superior to other offerings. It also doesn't perform the way it's sold.
Leadership. Or lack thereof. It's more chaos, pivot, back to the drawing board.
Pay. Entirely venture capital and angel investor funded, so salaries (and resources) are low. CEO invests in sports cars and multiple homes, not his company.
High turnover of great, talented people. The "Be a Family" core value couldn't be further from the truth. Zero of the original founders are still involved beyond a weekly stroll through the empty office. CEO was not an original founder, but came later.
Core values are not lived, but just look good on the wall.
High executive turnover. Previous COO, CMO, and multiple VPs have left or been forced out. If the team closest to the CEO can't hack it, how will you?
Revenue. Or again, lack thereof. The reliance on investment money is so high, the MRR is quite the opposite. If a round of funding doesn't come in or is less than expected, there WILL be layoffs. This is not "high growth" as they'll tell you, and certainly isn't sustainable.