Cant beat em, Join em.
You can still improve even while being stomped.
See your goal is to get stomped less and less each game.
Ask yourself, Is there anything you could have done to slow down their snowball?
did you die when you could have prevented it with map awareness/wards?
Could you have gotten more CS?, If there was a chance to get a kill were you able to take it? if not, what stopped you?
When you died, what could you have done better?
Did you time flashes? You can be amazed how many plays you can make when you know the enemy doesn't have flash lol.
~Before you get into the game...did you make sure you have optimized runes and masteries?
i know these seem minor but they can have a huge impact on how you play the first few levels, and could mean the difference between a kill or a death levels 1-6.
While in-game were you building the proper items for the situation?