Jayce damage a little too good?

Please... for the love of Urgod use periods, indentation, make a paragraph, something. This was extremely hard to read.

Also, I think you need to organize your ideas. It's difficult to see what exactly you're getting at.

A) Jayce has a early game disengage, he gets it at level two and effectively is a little "fuck you" to level two cheeses that manage to close the ranged gap. B) Until level six, he effectively has more spells to cast that are small but powerful AOEs/or single target spells, making him a stronger dueler than most for quicker trades. C) Jayce's sustain is shit for none. He wont gain health back like Tryndamere, and if your keeping up the tiniest bit of pressure, he cant hammer farm. He may hammer farm if he's stronger than you just to rub it in, and nothing to do then, he's getting his mana back. D) You can beat the shit outa most Jayces as Irelia, Olaf, and Fiora, who if you have experience with(if you don't, its not gonna end well) work wonders against Jayce. E) the reason his damage is high is just because he has multiple spells, If you just let him get them off without picking at how to dodge or stay engaged on him appropriately, your probably gonna die.

I can't say I'm a Jayce main, but I do have a lot of experience playing him(140k lvl7) so this may help you. but then again I'm just a random board plebeian piece of garbage, heed with care.

Poke mobility burst 2 forms one of which refunds mana disengage AS steroid armor/mr shred .hmm his only weakness is cooldowns which aint a big issue with the current itemazation available. but you know rito likes to leave overloaded champs out there till ppl start crying to nerf them then they make em unplayable for a few years

not if you can sidestep

As tryn max mocking shoot in hard ad matchup.

Also Jayce is kinda weak right now

As a Jayce main, Jayce is not a problem anymore. I have been maining him for 9 months, and the new 'lethalty' has truly brought him down. I now main a new champion, feelsbadman, hes not good like he used to be.

Run at Jayce, he will normally E you away then you use spin. NEVER use spin or flash to engage unless you have both and can overpower him.
You have sustain, he doesnt. Abuse that as much as you can.

Trynd is similar to old Fiora where a battle gets flipped once the ult comes into play so bait him into all-ins and ult away his burst and crit your way to victory.

90% of his dmg is physical so any and all armor will help, especially . If youre tanky enough to survive his burst his DPS isnt too daunting especially after his W cannon form is over.

Sustain can easily beat Jayce since has huge mana problems and zero built in.

Use the bushes, play cautious during his level 2 and three power spike.

The lane is completely yours at six.

Jayce had no late game damage with his popular build and it was just heavily nerfed with lethality changes.

Depends what defensive items you were building to be perfectly honest. While most of Jayce's damage is physical, his R to hammer stance and his E in hammer stance both deal decent magic damage, which is why the A.Pen build was so good. By having a lot of A.Pen, you need to build a lot of armour to counter it, which leaves you susceptible to his magic damage abilities.

As trynd you need to be taking offensive masteries. Defensive masteries and your ult do not work together.