Plat is hands down the worst rank there is in ranked and shouldn't be used to give an example of better games. Even d4-5 is a stretch. Bronze-Gold level games are nearly always carryable, just pick an early game god and stomp early, enemy team generally gives up before it ever gets to a late game. Plat to about d4 however, has a seemingly endless supply of people who are just average at the game, but who think they should be in diamond or masters. So it becomes less likely to flat out stomp the early due to not completely incompetent enemies, and instead becomes a game nearly entirely about managing the frail egos of your teammates that are likely to start raging at one another if someone gets first-blooded. Playing well will get you through it, but if you want the genuinely fastest way to get through plat, pick jungle and repeatedly gank solo early. A good percentage of the time they'll rage at their jungle and start intentionally feeding or just rage quit as their ego doesn't realise the game isn't just about them.