Some newbie questions about Samurai and its actors.

Alright so the only Power Ranger show I ever watched was Samurai more than a decade ago and its also the only Power Rangers show I know (not counting random youtube clips from the other shows).

Apparently not only is it universally considered to be a bad show but now im hearing all the actors are criminals! ones a murderer, the other beats up old people, another one goes into "confinement" whatever that means, blablabla, so can anyone explain to me:

1) why is it a bad show?.

2) what happened to all the actors? especially the red ranger and the gold ranger Antonio (hes the only one I remember then name of, lol).

From what I have seen the actresses and the obligatory comic relief duo are doing okay so theres that.