Why Global Mu gets more and more slugish with bad performance?

Over the years, everytime there is an update on that server the FPS gets much worse than before. It reminds me of Mods of other games where the game becomes progresively more unstable and hard to run, because they are practically building a program ON TOP of the game to change things, instead of working or having access to the game code. Kinda reminds me of how Heroes of Might and Magic 3 In the Wake of Gods turned out.

Is that what is happening with Global Mu? The devs got drunk, forgot how to work with the Unreal Engine of Mu and they even burned (or vomited) over the papers detailing the code of the game and went:
"FUCK IT! Just duck-tape dis shit update on top of this old garbage. I dont care they conflict with one another, just do it!"

"But sir, that would demand even more resources and PCs that most of our Brazilian demographic cannot afford to-"

*gets shot by the boss*

"Anyone else? ....good."

Anyone knows the details? Even Private servers with far more updates than GM managed to run smoother than a baby's ass, while the other suffers an Asma attack every step it takes.

Their goal is more likely to make more money, if you haven't noticed then you are drunk...
if they weren't carin about that, their whole servers wouldnt be so laggy aswell.