C*ckblock is a highly sexist, misogynistic term
I can easily complain about other common LoL terms players love to use like "you have downs", "cancer", "rape", "gay", etc. but I want to pay specific attention to the word "c*ckblock" because the amount of sexism being peppered in that word couldn't be any more obvious.
Take for instance a common phrase that someone has used in the past: "Janna is such a c*ckblock because she prevents our assassins from killing their ADC's"
You see the problem with using that sentence? When you say "c*ckblock", you are referring to the act of a woman refusing to have sex with a man, and you are using it in a highly negative tone. And by applying it to Janna's case, you are basically saying that the act of Janna preventing an assassin from killing an ADC is just as bad as a woman refusing to have sex with a man. A woman should NEVER be forced to sleep with a man and likewise, a man should NEVER feel entitled to sleep with a woman he desires. Otherwise, you are promoting rape culture, and such a thing should never be promoted in a community where a large amount of people who play it are women and girls.
You can use other phrases or words like "Janna is too anti-aggressive" or "Janna is boring to play against", etc. But please, don't use misogyny to describe a negative situation.