To understand the "suppression" of some of Tesla's technologies their development must be taken in historical context and at global scale.
Tesla's transmission system was developed to transmit around the entire planet in the early 1900's. War was pretty much a constant in the world at that time. There was always a war going on somewhere on the planet. The telegraph played an important part in the United States Civil War and it became clear that electrical communication of information was one of the keys to waging war. Communication has always been and will always be one of the keys to successfully waging war whether it be offensive or defensive. Look at the technologies used today.
In one of his articles around that time Tesla made the statement that he could transmit information that could be "as private as a thought" meaning it could not be intercepted. That would be a very bad circumstance for any military. Intercepting communications and especially interception without detection is one of the fundamental functions of any military organization. If I remember correctly, WW I was on the horizon when he made that statement and it would have undoubtingly concerned military organizations. There's no doubt in my mind that if he had been located in any other country in the world they also would have suppressed that information. Good or bad, that is the way of the world then and now.
This was also tied to the transmission of power and if you think about the global scale of that, it has enormous geopolitical implications. Tesla said he could power the world with a few transmitters. On one hand that sounds good to us but on the other hand, geopolitically speaking, what government in the world would want to be beholden to another for their power and be subject to having their power turned off for political reasons? Though scientificaly possible it ignores human nature.
The small number of power stations needed presented another problem if destroying one power station could destroy the power supply and communications of a whole country. Imagine today's world being totally dependent on 8, 10, or 12 transmitters. What if the 09/11/2001 attacks had not targeted The World Trade Center but the Tesla power transmitters that powered North America.
One has to also realise, in historical context, that Tesla was from Serbia and had offered some of his technology for sale to Russia, Germany, and a few other nations. So while he was working toward peaceful ends by attempting to make war impossible, or at least not profitable, the world he lived in was having none of it.
When he died WW II was raging and the nuclear bombs were already under development but not yet used. Of course, they would confiscate his papers. What government wouldn't if he had offered his "death ray" to foreign countries?
To understand Tesla, more than anything else, you have to understand the times he lived in. Sadly, things haven't changed much.
The 1970's movie "The Man Who Fell to Earth" was an interesting take on Tesla's life. It's not about his life, per se, but he is said to be the basis of the story.
Tesla lived in the second industrial revolution when men were conquering the globe with technology. The same problems are present today. And the way to defeat those problems is to make small individual units, be they one man, a family, or a neighborhood, autonomous with their own power supply and the ability to provide for themselves their means of survival.
My moniker is related to that idea. THX 1138 was the movie George Lucas made just before he made his first Star Wars movie. It's dated now but still relevant.
I'm not at all sure Tesla's work can be scaled down to that level. He was always interested in providing industrial scale power and communications to the world. IMO, what we need today is small scale autonomy. While large scale integration has its benefits it also has its drawbacks and unintended consequences, the vulnerability of the interlinked power grid for example.