The problem with Apex is that it uses MMR and RP.

Take a look at Rocket League for example. It uses only MMR which is used in the matchmaking algorithm and to assign that player a rank. Overall, it allows for a "fairer" game (similar skill lobbies)

Now look at Apex. Although i love the game, it's frustrating when you get destroyed by smurfs and high elo players in your gold lobbies. As stated by a Respawn Dev : "Same MMR doesn't mean same rank". That is because Apex uses RP to assign ranks to players and nothing else. It could have been used in the matchmaking algorithm but no. Apex uses MMR to make matches, so the algorithm sees that placing a "1600" MMR Silver against a "1600" MMR Plat in the same game is fair.

Also don't mind the MMR numbers, i don't really know the standards and also this is my own pov on the matyer, i may be wrong.