http://labor-employment-law.lawyers.com/wrongful-termination/constructive-discharge-an-abusive-atmosphere.html
Need to make sure you have not signed the arbitration agreement.
Need to make sure you have documented records (digital capture) of escalation to management/hr.
Get those things in place first.
It is common these days to see an offer to management of increased golden parachutes and severance if they create conditions that will "motivate employees to self-select vs paying severance". That is likely the goal - to create an environment so toxic that people can't stand it and leave. But then make sure that the Compass results are being covered so the company can say "we were focused on making things better, trying SO hard". It's probably a smokescreen in case the government or attorneys do show up.
Best thing you can do is mentally check out. Hit zombie mode, do your work, toe the line, and leave. Don't break rules. Don't do anything term-able. Document issues as they arise. But make them pay you. The Cabela's name and the name ofthe company might buy the place can't afford to cut people lose without paying severance - so make them pay you. Clean up your house and get it on the market, move into a rental until the storm is over so you don't lose your butt on your property. But dig heels and hold on.