Sorry man. Being in a 4v5 you had virtually no chance late game unless the other team made a huge mistake.
The split push can be the best thing or the worst thing of course depending on your team. trynd late game is super strong. You could destroy him in lane, but all he needs are 2 items to come "online".
Basically it all starts at champ select. If the enemy team picks a trynd you have 2 options.
A. Someone on your team likely your top laner picks a champion who can duel trynd late game or who has the ability to make sure the wave never gets to your turret without trynd killing them. So essentially you have to match the split push to prevent them from pushing. Much easier said than done late game.
B. In champ select you need to pick a poke or hard engage. Basically the most common counter to a split pusher is you push up on them and force a fight. This only works if you can force an engage or poke them off. Meaning Trynd will have to recall to help his team. If he doesn't there is a pretty good chance 4 people will take objectives faster than he can.
This of course only matters if your team is the stronger fighter in a fight and you can lay down the poke fast enough to push the enemy off objectives or have hard engage like a Vi to initiate the fight. If the other team has a mage like Viktor who can easily clear a wave with 1 ability every time that waves come to turret than its highly unlikely you will be able to poke them off. In this case hard engage would likely be your best bet.