"The above is our final offer. Please give us your reply no later than Wednesday this week. After confirmation, we will sign the formal agreement no later than Friday this week. If you do not accept, we will put the new round financing work on hold and immediately initiate a lawsuit against Allen regarding labor relations, shareholder qualifications and directors' fiduciary duties. We have sufficient evidence of Allen's violations of the labor contract, employee handbook and shareholder agreement, such as his absence from work, providing services to third parties and obtaining benefits during his employment, and sending the company's confidential information to third parties. We will also fully disclose such situations to the market."
from the Lawyer.
It doesn't sound like you want to pursue it, but you could make a case that you signed under duress. Not knowing any specifics about your situation, personally, I would focus on moving on to the next thing.