PSA: KDA doesn't mean anything in the grand scheme of things, the end game lobby reveals all
If you go something like 8/0 with a fuckton of CS but you only got a measly 5k damage dealt to champs, next to no objective damage, revolting vision and CC points? You're not good, you're just a braindead last hitter that waited till the target blew everything on someone else who managed to get them low enough.
You can have zero kills whatsoever with a shit ton of deaths, have shit CS compared to others, but if you have major damage on champs, respectable damage on objectives, and your cc and vision is through the roof? You're a good player that kept getting focused by the enemy who never had to be scared of your "carry" punishing their positioning by going after objectives or collapsing with the team on the enemies that ganged up on you.