Kakuzu is still pretty good yes and no there aren't many counters for him the ninjas who can counter him should be Edo itachi, Itachi kimino(depends on your chakra) and sasuke rinne(not much effective if you have fire main's shield) and ninjas like yamato who can * chakra by their mystery since that will lower kakuzu's damage but i don't think anyone uses him so you should be worried about itachi only

it can be easily removed if you see most of kakuzu teams they are mostly with fire main so when you'll control kakuzu fire main will just remove it