Yo im a Trundle OTP currently Plat2 aiming high i already mained like 1/3 of all champs but Toplane is the most enjoyable lane because of all the 1o1 fights you have. I have like 200.000 Mastery points on Trundle i also play him fill supp or jgl sometimes before that I was a Kennen onetrick but not having a Tank in this Meta is counterproductive

He's maybe the best LvL 1 champ but he doesnt fall off in late, you have great snowballing and dueling potential also peeling and splitpushing is a piece of cake if youre ahead his pillar is great for catches and overall a good utility tool also in Lane, his Dmg is amazing if you can calculate it, my biggest problem with Trundle is getting camped

Rushing Titanic is really delicious the HP synergises with your splitpushing potential and your ult after that I just go Full-tank since I dont lack dmg anymore because Trundle gets free AD with his Q

Pretty self explaining, LVL 6 is a great powerspike also try knocking the enemeys away or to yourself with your pillar practice this since it is one of the most important skills of a good Trundle, if you're advanced you can cancel dashes/jumps or even casting animations
Some examples some hard some easy: Sion Q/R,Riven third Q/E,Ziggs in Jump,Tristana W, All dashes that are cc able, Thresh lantern etc

Pros:
Fun Lane
you can potentially win every laning phase or atleast most of them
a lot of pushing pressure in enemy jgl
Really high tankyness and Dmg output
Tank younter you just shred them for your team

Cons:
no real escape except running
no real cc except your pillar and the little Q slow
All inti healing things counter you
You can't 1v5 even if youre fed atleast most of the times

dont waste mana by Qing minions Q a minion if you dont get it without Q or if you want to all in the enemy laner after 4 secs (Q cd), also only use your W to hard push or farming under the tower never in laning phase if its only for cs you need the W for all ins

your pillar needs to be useful stay with your carry and try catching/blocking enemys with your Pillar also ult the Tank or sometimes you ult their carry if you need to burst them down very fast (fed adc or master yi or smthing like that)
Try helping your team with objectives like getting Towers (after 2 Towers top join your team or split bot) or Herald/Drake or some TP plays TP is also worth if your mates dont die