From the glance I took ( working at the moment so I have to use mobile ), I would definitely say focus on lowering your death count, improving your cs, and ward more. I'm not sure where your deaths come from since I haven't been in or watched a game of yours, so I can't say for sure if it's a product of the lower ward numbers. In your first recall in top, you can always buy a pink and drop it in the river brush or tri depending on what side you're on. It will help a lot against enemy junglers.
Since you play Olaf it's probably hard to not want to scrap a lot in lane, but you shouldn't do it if your cs will suffer for it. Try to only pick your fights when you won't lose cs, even better if you can fight when they will have to lose cs to fight back. Kills are great, but cs is king for making your gold.
I would also say expand your champion pool whenever possible. If you like Olaf, Nasus, and Udyr - perhaps pick up a Darius / Malphite / Cho'Gath / Renekton type of champion. All beefy guys that build damage and tank items and are generally pretty solid. It's hard for me to comment on junglers since it's not my thing, sorry about that.