Yeah, but all of those flaws were intentional. Sheeve (Thats Sidious' actual name) knew that at his best, Anakin would kill him with ease as he is the chosen one. But he wanted to rule the galaxy and eventually universe unapposed, so he made the suite a hindrance to Vader's skill so he wouldn't be beaten. He made the dark armor heavy and cumbersome to move in, much of the parts were mismatched so they snagged and pulled at his body, the synthetic breathing kept him awake, the synthetic skin was constantly itchy, and that control module on his chest would beep for no reason.
Of course the suite also had benefits like enhanced vision and hearing, super strength, and mandolorian iron limbs to withstand light sabers. So silver lining.