@merchantHelios >5 man team games meaning your experience relies on 4 other people
>Microphone is practically required
>Can't learn against players
>Bot matches won't prepare you against players
>Game often has matches counting towards some progress bar (ie. unlocks that affect gameplay in LoL or cosmetics in DOTA); if you try to teach someone in a 1v1 setting then that doesn't count for some reason
>Queuing with a team makes it so that you face organized Chinese 5 mans
>Even if you know the game, long periods of absence means you're relearning several patches and years worth of changes