Most hated abilities to play against in ARAM?
Fiddle's E, literally point-and-click harass on your entire team
Veigar's E ugh
Fiddle's E, literally point-and-click harass on your entire team
Veigar's E ugh
brand ult. just why?
Cassiopeias miasma is my most hated. Its also quite annoying in summoners rift, it lasts too long considering its a basic ability and covers a big area.
I have to agree about Fiddle's e. holy shit that's annoying.

Galio or Amumu ults. Snowball -> Flash -> R is a won teamfight for either.
Q, feels like my teammates eat every single arrow and never dodge a single one. Like they just stand in his range when they have nothing to gain from not playing farther back
Also Ziggs E it just last way too long, like literally 10 seoncds
Jhins entire Kit makes ARAM a literally carnival game for him.
just pick any random mage, then pick any random ability that mage has. and you pretty much nailed it.
Q
R
W (She will steal all your health things T_T)
Jayce E+Q is pretty devastating once he gets half an AD item.