you're in no position to be a reliable judge of what is or isn't beyond others' capabilities.
Nor are you an expert on coaching or parenting.
People who give up when they struggle learn that behavior. Usually from people who respond negatively to failure.
There's a huge difference between playing the game and learning the game.
New players are not expected to learn how to play high level competitive League of Legends. They're expected to play a video game, and are handed tools by Riot that may entice them to willingly and earnestly keep playing. Nothing more. They have the data on what works and what doesn't. Zed is cool, stylish, and attractive, and they have reason to believe its valuable to recommend him.
Stop looking at the new player experience from an experienced players' perspective. Your expectations are flawed.
New players at this stage in the games life cycle are very likely people who have never heard the term "smurf" outside of the blue dwarfs from the cartoon/movies, and they'll be playing against bots for quite some time. If they skip straight into PVP, they'll be playing with/against mostly others who struggle to remember where their hand is supposed to rest on the keyboard.
The whole point of a "New Player Experience" is to attract the people who aren't already "in the know" (and those who have been on-the-fence or opposed to a lesser degree). Its for people who saw an advertisement and got curious, or were recommended by a friend, or saw a youtube/twitch channel personality they frequent trying it out for the first time and wanted to join in.
Not people looking to win. People looking to play a fun game.
Zed is fun. Lee Sin is fun. Flashy play makers sell games.