I am done with Adobe period

Seven years ago i bought a copy of Creative Suite 6. It activated and was registered with Adobe online. It has been happily running along until February 2020. All of the sudden, and without warning, a big pop-up window appears on top of everything else that says the serial number is invalid and to call an 800 number for assistance. BTW, that popup window cannot be cancelled or iconified. It is forced to be on top of every other window. Essentially blocking me from using my PC altogether. You can shove it out of the way for a while, and the it re-centers itself on the monitor. You also cannot right-click on the taskbar icon and close it. Boy these guys are pushy.
So I call the number and speak to someone, who I assume from the accent, is in India. They are adamant that Adobe is in the right and there is nothing I can do about my initial substantial monetary investment at this point. I can, surprise-surprise, sign up for a monthly subscription for an online web based substitute for my desktop CS6. This is somewhat like throwing good money after bad. Other than spend more money with Adobe, he has nothing to offer.
And it strikes me odd that my continuing to use the desktop software isn't causing Adobe any additional harm; financial or otherwise.
And personally, I do not like the subscription based model for using software. If I can't buy it and install it, then I am not interested.
So I also have a copy of Acrobat X Pro which is also activated and registered online with Adobe. I ask him to confirm that the serial number is valid. It is right now. But he can't guarantee that it won't be invalid tomorrow.
So I am done with Adobe. I have uninstalled everything from Adobe on my desktop computer. And when I get around to it; I will also uninstall whatever is on the rest of the PCs. If I need to use something that was from Adobe, I will find another vendor even if it isn't built with the Adobe specialness.
I cannot think of another company that has acted with such callous disregard for its customers and offered so little help as Adobe.