Ok. The problem is that, legally speaking, there is no law against an employment treating an employee poor due to simply a desire to intimidate. The Supreme Court has specifically held that hostile work environment claims require that the harassment be based on race, religion, gender, age, disability or FMLA use. Any other purpose falls outside of what the law prohibits. The Court went so far as to say that our employment laws are not a civility code, but only intended to deal with specific issues of discrimination.
Some states, seeing a problem with that, have tried to pass workplace dignity laws that would make generalized harassment and intimidation illegal, but no state has actually managed to pass one of those laws to date.
Now, on the contract issue, a handbook is rarely enough to equate to a contract. The language would have to be so specific that it essentially promises, in its terms, that a person can only be terminated for cause. Otherwise, it doesn't amount to an implied contract. This is particularly true in Florida, which is a very employer friendly state. Without an employment contract, you are an "at will" employee and legally can be terminated without cause.
So, while I really do wish that I could tell you some means of forcing your employer to treat you better in this situation, there just isn't any legally based method to force them to do so. You've not pointed to any laws that they are breaking.