The immunity on its own is not the problem with WM but when you pair her with a ninja like Kurenai with enchanted skills then its get really stup1d and impossible to deal with it. Add to to that a ninja like Shisui or MM and you got the most annoying team to face against while you yourself have no counterplay since no matter who you focus you got a cc reflect / shield + heal / a full team cleanse and mystery reset to do everything all over again next round. But thankfully theres a guy comming soon who will deal with all these mains immunities and deal the finishing bL0w to most of these immunity teams except for jinchurikis ofc.