First, there's your story. To describe it as vague would be an understatement. What was the medical device? If the device does something important for the patient, wouldn't a big red button also be dangerous? You wouldn't want it turned off accidentally. Also the machine needs a button or switch to turn on, right? So why not have that component be the physical switch? And if the kill switch is on the touch screen, wouldn't that take up valuable pixels that could be used for other purposes? It would also make accidental triggering more common.
And you claim the button removal request was from the Chairman of the Board of Directors of a different company, who was a major shareholder? The board of the company you worked at, the C-level executives, and management all caved to him but you didn't, and you kept your job? That makes no sense. Someone with that much influence should have no problem getting an individual contributor let go.
Then there's you. Your Twitter account was created in September of 2017, but either you never tweeted until September of 2022 or your tweets auto-delete. Maybe you changed your username because neither archive.org nor archive.is have any history for your Twitter handle.
Your domain[1] was registered on September 22nd of this year, and it contains some general-sounding activism-du-jour. One might even call it "current thing". If anything it seems quite contradictory. Liberty does not march abroad... except when fighting a proxy war in Ukraine? OK, I guess.
I know my comment is controversial, but your post is exactly what I would write if my goal was to create perfect HN bait. It seems much more likely that someone lied on the internet than that things actually happened as described.