Everyone just loves untested forced updates. /s
So games should never go free or even discounted because someone else paid full price ten years ago?
That's an intentional misreading of what I'm saying. The issue isn't that it went Free to Play. The issue is that before that, a number of people paid for the product and then later that product that they paid for was removed from their library entirely.
Being replaced with a game that's Free to Play from the get-go isn't the same thing. It's simply not the product that was paid for.
Would you feel similarly about a physical product that a company took away from you because they were changing it? Not because the product caused any danger, but because they were giving you a newer one, with fewer features, but looked nicer? You wouldn't feel like losing access to things you paid for in the original was a problem? Why is it justified to take away something that was paid for when it's a game?