Best way to thwart a special counsel who has unlimited resources is to not hire a lawyer, stretch the case out for years with discovery if you don’t waive your right to a speedy trial, refuse to turn over discovery based on the 5th Amendment, secretly record all conversations with the prosecutor, never meet the prosecutors in person.
Never answer their questions, but record their threats if you don’t go along with their plea deal offers. That way, if you have a hearing related to a plea deal and the judge asks you if you might be entering a plea on your own free will, you can say “No” and drag out the recording of the threats.
Study criminal procedure, the basics of which aren’t all that difficult.
Study the criminal statute you are alleged to have violated and start reading the case law related to those statutes. Prosecutors have a bad habit of citing portions of cases that aren’t relevant and leave out the parts of opinions that state the exact opposite of what they claim. Happens all the time.
And, NEVER, EVER, waive your constitutional right to a speedy trial. There is no way a prosecutor can ever be prepared to go to trial and also provide you the discovery to which you are entitled.
Jury nullification is another effective way to send a message to prosecutors.