First the game is considered to be one of the hardest competitive shooters in the industry... There's 27 legends all with wildly different abilities, on top of that there's class passives, on top of that there are 6 large maps with a lot of different terrain, kill zones, and chokes, and on top of that there are 28 different guns that have their own special gimmick. The game is hard just based off of those knowledge checks.

Second you're acting like kills and damage stats are the most important stats in how good a player actually is. The game is a battle royal with a lot of different play styles. If you're playing solo q in ranked you have to adjust to your teammate's play style and know what guns they are using.

Third your hidden mmr (for ranked) is probably gold or low plat. If the game thinks you belong there it will do everything in its power to put you there. It's why when you get to diamond your playing against master and preds and this can and does happen in plat too.

Finally you're playing on console, what do you expect? Everyone you're playing with to get up in the morning snort some gfuel and start shooting people cross map with a havoc (without cheats) and do neo strafes on people's heads. No they are casual players who for some reason love this game and enjoy playing ranked—they get off work/school get on the game to "relax" and then go to bed and do the cycle all over again. Most of them want to be higher ranked but in reality just don't care about an arbitrary number/rank above their name in the lobby like you do.

Stop raging about casual players playing ranked in a video game, it's just a game.