That's an intellectual fallacy it's easy to fall prey of: if most cultures and nations have committed heinous acts in their past, one should assume they are still doing terrible things to this day.
MK-ULTRA is dead, but history teaches that one day we'll learn of something even worse that's occurring right under our noses in 2023. It is disingenuous to criticise what the CIA and other three letter agencies have done, while not being totally opposed to their existence to this day. Who knows how they are experimenting with people on US soil, how they are fomenting revolts and financing drug lords in South America today.
Sadly, any such criticism can be easily waved away by calling it a conspiracy theory, which is how they keep operating with impunity. The only difference between an outlandish conspiracy theory and history are the existence of declassified government documents.