"Too many things to do in too short a time..."
I started writing about the difficulty in MOBA's. Go check it out at my web page:
https://the-meanwhale.web.app/?p=mobaINTRO:
In short, they make it difficult by giving you too many things to do in too short a time. Tasks can vary from simple ones, like waiting a cooldown to end before casting a spell again, to more complex, like planning your build strategy according to your opponent team composition.
As there’s not enough time, you have to prioritize, according to your dexterity and strategic skills. A grand master player with superior skills can accomplish many times more in a given time than a novice who struggles to keep up with even the most basic things. To do your best, you have to prioritize the overwhelming amount of tasks according to your dexterity, (mouse) accuracy, tactical and strategic skills. Also, things like your competitiveness, motivation, and current energy level play their roles. After all, you suppose to be having fun playing games on your precious spare time, so you don't want to play on full throttle all the time!
In addition to having too much to do, you have your team mates who you can’t control. Team members have their roles (e.g. DPS, tank, and support), and they are expected to play accordingly. Healer character who wants to make suicide attacks to enemy backline instead of healing can ruin the match for the whole team. Therefore the team goodness is measured by how well they can hold up the house of cards (of roles) rather than the sum of players’ skill.
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https://the-meanwhale.web.app/?p=moba