How to make games not last so short?

Nowadays you will get a normal game 1 out of 5 times where both teams have chance to win and not just instantly lose when enemy ADC gets ahead. Because of the ADC meta the games last so short and are mostly one-sided. My idea is to increase the Death Timer so it doesn't just scale with game time but with champion's level too.

To be more precise the higher the level you are the longer your death timer is. This can stop extreme snowball where a champion wins his lane so hard and is 5 levels above everyone. The game is pretty much over if that one champion can solo carry but by making his death time bigger you will have more opportunity to make it back in the game if you shut down that fed champion.

Lemme know what you guys think about this. All opinions are welcomed.