Buffing the lowest W/R Champions?

While looking through the monthly, weekly, and daily worst W/R champions you'll see these champions consistently on the bottom of the W/R list.

Elise - Received a nerf to her damage but increase in utility. This forced her to become more of a tank than anything. Urgot - Has a lot of potential but kit needs reworking, recent buffs made little difference. Zac - New jungle makes him very hard to play, with sustain being sub-par at lower levels. Being a support/top you get rekt when trying to trade. Zilean - Could see a re-work of some sorts (Even the master of time can get old) in general he either does very well or very bad. Ult is very useful though. Evelyn - Just a bit too squishy to do anything, you'll have to be fed to really stand out at all. Also super easy to counter.

So, is there any other reason why these champions are always at the bottom of the pile? These are just some reasons I could think of as to why.

Do you think they need a buff? Be played different? Players that play them aren't good enough? No items specifically make their kits better?/etc.

Thanks for any feedback and happy holidays!