If you suspect this employer of deliberately (and repeatedly) filing fraudulent 1099s, you can report them to the IRS. They will want to hear from someone like you who has inside knowledge as a (former) employee. You can also claim a reward (a percentage of the money they scammed, I think). To report the fraudulent tax filings, fill out form 3949A and then form 211 (to claim any reward). Given how egregious this employer of yours has been, it might be worth the effort.
See IRS page on reporting suspected tax fraud
"Report suspected tax law violations: Use the Form 3949-A, Information Referral if you suspect an individual or a business is not complying with the tax laws. You can submit Form 3949-A online or by mail. We don't take tax law violation referrals over the phone. We will keep your identity confidential when you file a tax fraud report."
