Contract with local law enforcement they are well trained. TSA employees, they are not law enforcement, are trained to grope people and search luggage. Many have applied for law enforcement jobs and have been rejected. Research and look at the criminal incidents, many felonies, committed by TSA employees.
If a city, county, or state police officer violates your Constitutional rights you can sue the employees and the employing agency in federal court, see USA Title 42, Chapter 21, Section 1983, the Civil Rights Act of 1871. You cannot, except under rare circumstances, sue a federal employee. You are pretty limited to The Federal Torts Claims Act, and the US Supreme Court Case, Bivens v Six Unknown Agents.
Yes, I do have a low opinion of TSA.