Tbh if you are able to land her R your going to be able to do a lot more dmg. Try and and land her full combo when you can. I do think she needs a small buff for her early game but besides that she is strong. If you fall behind early she obviously is going to lack in the dmg area. Best thing I can suggest is try your best to not engage so much in the early game especially if you going against a strong early game champ , stay close enough to gain XP and and cs when you can, if you struggle with cs you can build
to make it easier but remember your going have to build dmg as soon as you can. I also suggest when you get your W get the rock ability and hold onto that since it gives you attack speed and more auto dmg (also really good for poke especially against melee match ups) , also good to use to cs with and taking turret plating.
(im no pro or anything but I've been playing a lot of games with her and this strategy helps me out a lot in early game as that's my weak area.)
edit: Idk why but when i post my comment its changing my words, prob coz i had to translate the page but yeh hopefully this makes sense to some people who dont understand her too much.