Yeah i've played against shacos on treeline and they're just all over the place and you just can't catch him. Even with all the nerfs he's so annoying lol. I would try learning how to play him, but he always gets banned in ranked queue. But then again just buy an oracle and he's pretty much useless in teamfights.
you'd think but no. he can just pop his ult and turn it into a 6v5, and throw a box in the middle of your team to fear everyone
really good jungle shacos are a nightmare
believe me, it's worse for whoever is jungling against him. a good shaco can take double buff at level 2 and then proceed to murder the other jungler before he's even halfway through his route. then fill that jungle with boxes and steal all of their buffs.
do you have any idea how annoying it is to be like "oh i died. it's okay, i can recover. hopefully he didn't take my bu- oh god i just lost half my health to a box nest. i'm still alive at least. oh look, red buff is gone. oh look, big wraith is gone. oh look, big twin golem is gone. oh look here's shaco aga-"
and your team is too dumb to help you