You have not been lied to. When I wrote that the code was compatible with SU5 it was, at that time. However some late changes cause some issues we rather figure out before releasing. Part of that is being discussed in the support corums and including tweaks set in the dev mode, manually deleting files etc. Not something we want to ask normal customers to do. There are some other considerations we are simply not allowed to discuss. I am sorry you feel so offended by that.
As you made fun of one of my moderators and have gathered a large amount of downvotes by other users (coming close to an automatic ban) I am putting your account on moderation. I am sure you will interpret that as yet another attempt to hide something, but so be it.