Either move hail of blades or lethal tempo over to towers rather than runes
I'm honestly getting really sick of people walking away with 50 hp because towers take 10 years to attack. It's even more infuriating when the games a 4v5 so you have to depend on towers to stay in the game. God knows Riot's report system is pure garbage so it's nice to know the person who left gets away scot free.
Do something to make towers an actual threat beyond level 3