Trundle is frustrating because
he is a flex pick
his kit lacks counterplay
I mean you cannot play any tank into him because he win by default simply by stealing your stats he does the same in a teamfight he is also one of the strongest duelists in the game so you wont beat him with many of those either since he steals their ad and tank stats too
He will pretty much always outstat you when you play a tank bruiser or fighter
That said there is one tank which soft counters trundle, but you still have to be carefull and place vision because he can still get you with help
why? because he doesnt use basic attacks to fight really so his chomp ad steal wont affect much
trundle relies on basic attacking so he has to go melee on your face and this guy just kites him around farting in his face.
Is also a splitpusher however doesnt take towers as fast but now with extra ap damage vs turrets will be a bit fatser then before and can build zzrot too if needed
Also you ult after he uses his ult to prevent him from stealing your bonus stats because you dont need ult unless he and possibly his jungler come to allin.
so you can ''ignore'' trundle with this champ he can't properly duel you so he will require help if he want you gone
singed also has the possibility to ''counterbuild'' by grabbing a warmogs a zzrot and a rylais for extra kite now you can sustain splitpush just as effective and quickly and he cant fight you all good items on singed
and lets not forget you can use ult after he does so he can't steal all of your tank stats this allows you to stack hp over resistances softcountering his ultimate, its still going to leech hp but your ult will regen that whilst giving 80 armor and mr
Therefore you can completely nullify the trundle top pick but this only works as a counterpick
Its a softcounter because you sort of will be stuck with the trundle so whilst nullifieying him you wont be around to help your team yourself
so its a 1v1 and a 4v4 essentially
another option vs trundle could be
but this is more risky.
You can beat him ealry and set him ebhind so it will take longer to ''outscale''
You can build
this will give you grievous wounds on ad damage applyieng your passive emans he has reduced sustain for 10 seconds
You have a heal too so there is some sutain available on top of having very high healthregen
He will still steal your ad in fights but after a couple seconds you gain a mosntrous amount so its less effective vs this guy
You gain free armorpen ad the mortal reminder and most of his armor will be useless even when he steals yours and if he disngages with pillar you grab him with pull
So you cn kinda deal with the trolly nature of his kit he steal your stats but they are innefective vs you because you cut through that armor anyway. You can gut his sustain by sustaining yourself and his ad steal will be vastly overpowered by your passive
And blocking your escape with pillar is meh, you are very immobile anyway so if you are really over extending your would have been fucked regardless vision will help here so spam pinks
You can then proceed to build armor items like these
because his damage is pretty much basic attacks will help nullify lifesteal if he builds it.
Block a % of basic atatck damage his ult wont stop that
attackspeed slow and active slow overall good because again his ult wont stop the attackspeed slow
also slows attackspeed will also be a good item
all good items vs trundle