There are several things worth investigating. One of them is a statute which prohibits employers from listening in on personal call. Doesn't sound like you're a call center operator where the rules are different
If an employer learns that the employee is job-shopping and trying to find other employment, it is is common for the employer to terminate the employee. That is not an unlawful termination.
It is not unlawful for an employer or some managers of an employer to socialize with some employees but not all.
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You may be terminated in this state if your current employer finds out you are seeking a position with another company. There is nothing illegal about that.
There is nothing illegal about management favoring certain workers over others in social gatherings. They have the right to grant or restrict access to internal software based on performance issues. Your degree is irrelevant as to whether you can perform your job or not. Termination for an inability to operate a computer in a manner which your job requires is also legal.
In general, a company may impose upon its workers a dress code. That ability is very flexible as well (consider workplaces like Hooters as an example.) The law imposes limits on this of course, but an inability to wear shorts on Friday probably does not cross the line.
Nothing you have mentioned so far seems to rise to the level of a lawsuit. Perhaps you could provide more information as to why you believe you may have a case.
Practically speaking, I recommend that you consider obtaining a position elsewhere. It is likely that your employer is now trying to box you in until they can terminate your position.
Best of luck to you.
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