@hayhoryes, there are so many rng based variables in BR's. Off the top of my head, here are a few things:
1. Ring is a huge factor and if a team has to travel across the map to get to the final circle, they will run across a lot of other teams. Also, the final circle, it's movement and the environment (buildings, rocks, slopes, hills...etc.).
2. Loot off drop can vary. Even if you landed at a POI without any other teams, there's a chance that you might not get favorable loot, which will put you at a disadvantage. Now, imagine being contested and now you share the POI with 1 or more teams.
3. 3rd parties. If a team fights another team, and if they are not quick, they might be subject to a third party, possibly 4th, 5th...etc. All depending on where the other teams are.
4. Opponents and their decisions can also create rng.
Better teams might have more chances to win or place high, but since there's a lot of rng involved, they could lose enough games and splits to end the tournament without accumulating enough points to do that.