Blocking people talking. Refusing to turn over requested documents. Preventing people from testifying. The loudest way to say what?

First, Trump complained that the House did not follow protocol in beginning the impeachment investigation.  So, the House, although it was not required to, took a vote in favor of the investigation.  Trump still called it a witch hunt.  Then Trump claimed that testimony was not from people who were in the room to hear the July 25th telephone call.  So, the House called witnesses who were in the room at the time and they gave first-hand testimony.  Trump called it a witch hunt.  Trump claimed that all this was being done out of the public eye and called it a witch hunt, so the House opened the testimony to the public and Trump called it a witch hunt.  The GOP was given an opportunity to question the witnesses, but they weren't happy with that and Trump called it unfair.  The House has not referred their findings to the Judicial Committee.  They have invited Trump and his cabal to attend and give their side of things, but Trump isn't having any of that either.  

If I was being accused of doing something illegal that I didn't do, you can bet that I would be Johnny-on-the-spot to testify on my own behalf to correct the charges.  A failure to do so would constitute an admission of guilt.  Anyone with half a brain cell left knows that Trump is guilty of many things, not just the charges which the House has put forth.