ADC Tryndamere? Don't do it. His real strength is splitpushing.
When game starts, build Doran's Blade and a health pot. Make sure you grab yellow trinket. Mute everyone with /mute all, since no one knows how to play this fucking game.
Hit minions. Don't stop hitting minions. Get your E first so you can GTFO if the enemy jungler comes. If the enemy top tries to do something, use W, hit him with a few basics. If you kept hitting minions, you'll hit him with a 35% crit chance. Fuck him up. Use Q to heal, then keep hitting minions. Don't stop hitting minions.
Build BOTRK ->Shiv ->Infinity Edge . Upgrade your trinket at level 9. If you kept hitting minions you'll have enough gold.
Hit minions. Don't stop hitting minions.
Enemy comes to lane? Hit them. Hit them faster. FASTER.
Someone else comes to help out? Run away. I don't care if you're three levels above them (and you will, just keep hitting minions) run away.
Wait for them to leave. Ward. Push lane again. Keep hitting minions.
Is your team losing? Good. Now you can push into the enemy base. Keep hitting minions.
Never help your team in teamfights unless you're 100% sure you'll make a difference. E in, hit them. Hit them faster. FASTER. Use Q if you get low health, then R. Hit them even faster. Then Q before R runs out. If they run away, W then E them.
Hit minions.
If you can't make a difference in the teamfight, then hit minions. Fuck your team, hit minions.
Did you die at any point pass lane phase? If you did, you're Bronze V. Buy Wards. Use them.
Do you have 75638928947 CS?
If you don't, then I have one question.
Why aren't you hitting minions?