Trundle is very fun to play with a lot of cool interactions with other champs mechanics pillar is very use full in play making and catching out enemies that don't respect it. Make sure to always try to single out someone with pillar so they can be focused by your team and cc locked.

You need to pick trundle with a good team comp or your not gonna have fun if you have a lot of cc you are gonna go wild. Your R with Challenging Smite will allow you to 1v1 anyone in the game fed or not just right click them you will win.