Evasion moves are banned from use in competitive. Smogon anyways but not VGC, I don't like VGC.
You take random damage rolls into consideration only when it matters. You should know what moves are guaranteed OHKOS, 2HKOS or 3HKOS so taking the risk of a low roll or a high roll is a last option thing.
You typically run 100 accuracy moves most of the time as they can't miss; the moves that have less acc have less acc for a reason, they're really strong moves or they have really good effects (a risk needs to be added onto them to justify such a strong move) such as Will-o-wisp which burns your enemy, a guaranteed burn is strong because it permanently halves the ATK of the burned Pokemon so a strong move like this needs to have decreased acc.
Status effects aren't completely random, like Sleep for example lasts for 1-3 turns, you have a chance to wake up each turn but each turn you don't wake up it adds 1 to a counter and once you reach 3 on that counter it's a guaranteed wake. That counter remains even if you switch out.
If you're complaining about the RNG of competitive Pokemon you just haven't played it or you're bad and don't want to take the time to learn to get good.
You take random damage rolls into consideration only when it matters. You should know what moves are guaranteed OHKOS, 2HKOS or 3HKOS so taking the risk of a low roll or a high roll is a last option thing.
You typically run 100 accuracy moves most of the time as they can't miss; the moves that have less acc have less acc for a reason, they're really strong moves or they have really good effects (a risk needs to be added onto them to justify such a strong move) such as Will-o-wisp which burns your enemy, a guaranteed burn is strong because it permanently halves the ATK of the burned Pokemon so a strong move like this needs to have decreased acc.
Status effects aren't completely random, like Sleep for example lasts for 1-3 turns, you have a chance to wake up each turn but each turn you don't wake up it adds 1 to a counter and once you reach 3 on that counter it's a guaranteed wake. That counter remains even if you switch out.
If you're complaining about the RNG of competitive Pokemon you just haven't played it or you're bad and don't want to take the time to learn to get good.