You need to work on the runes. The yellow crit damage runes are basically useless as you should be building Infinity Edge anyways.

runes

problems:
You are trying to over-complicate the runes. Just stick to marks of AD, seal of armour, glyph of magic resist and quints of AD. (you also have no quints)
Rushing BT before any form of boots. Movespeed is an important stat so you will want to get at least tier one boots before getting a blood thirster which is a very expensive item.
Varus is a very piercing arrow focused ADC so you should probably go BT then LW before your phantom dancer.
There seems to be no logic to your level up tree. You are not maxing anything first, you put a point in your ult at level 15 and you haven't put points in any of your abilities in levels 16, 17 and 18. I think you should put points in QEWQQRQEQQREEEWRWW.
You have put everything in one section. This makes it difficult to read and hard to find the information you want.
"(unless they have Kennen, Nautilus, Blitzcrank" I don't see why kennen is on that list.
"tip: Rotation means in what order you cast spells on the enemy." Never seen it called that before.
"Champion= Draven
Counter=Very Easy
Champion= Graves
Counter=Very hard" I don't think this is true. You said Draven is very easy because he has a short range but you said graves was very hard even though graves has a shorter range and deals less damage.

Nice runes and level 15 ultimate

a giant wall of text

I think the build on Varus is Q max w/ BT into LW.

Maybe run quints, or, max a skill?

c2v

I think you need energy regen marks cause otherwise you're oom all the time.

dude u srs? this is even worse than my guides