After a few years of playing standard I actually gave wild a shot and kinda liked it, however, now, when the expansion has gone live, I must say that all the bad stuff people mentioned here on the forum has gotten progressively worse.
As I have mentioned here several times, the main problem is mana cheat, the other are non interactive strategies, which given the right cards are basically unbreakable, usually relying on cards that (when used properly) cannot be dealt with from the opponents side. I do understand the concepts of OTK decks and have come to some sort of peace with those, but I do not really have that sort of understanding for an OTK happening on turn 5 or 6.
So my pick for toxic strategies in wild ATM (please not that I do not claim that these decks are unbeatable - cause they are not, however, they are very, very strong; what I am simply saying is that playing against these decks is a very unpleasant experience).
Neptulon priest has been mentioned many times and I cannot count how many times I have seen them pulling Blood of Ghun on turn 3 (which is far worse than Neptulon IMHO, at least for my deck).
Discard warlock - I do not think that it needs any further comment
Time warp mage - done with the quest on turn 6, no more play for you
Wildheart Guff druids - having 20 mana (hello Twig), Brann and other stuff is just too much
Honorable mention - Mana bolt mage - 50+ dmg from hand, no sweat, your mama can do that…
Honorable mention n. 2 - Death Knight access to Patchwork and the chance of getting it from discover effects - Mutanus on steroids just for one class.
So that is my top pick now. What is yours?