I'm sorry, but I'm going to defend kov here since it seems like you make this his fault all together, and there's been users like myself bugging him to help us out and fix things in the game.
Just keep in mind that more than the majority are still able to play the game, but yes there's a big amount of users that has faced issues. I myself have not had any slowdown or visual glitches from the patch.
Everyone in this community and the staff has gone without patches for almost half a year with things that needed to be addressed, kov finally takes time to sort these issues and our pleas for help, and now you throw something out like he ruined the game. And I'm slightly impressed how certain you are about it not being your computer or the hardware it runs since I just asked for some information about the computer.
The only way a game like this is going to be ruined is if nothing ever changes or gets fixed, and that's exactly what he's been doing with these patches.
I'm really sorry that the game doesn't work as it should for you, but please be careful with which words you pick. The game did go through some changes, and the game is running a new version of ogre, updating a game can bring issues like these, rak also told kov to look into it, and it seemed to be working smoother for some.
Could probably inform kov about users still having issues though and see if he finds the cause.