apex has 0.9 rating playing star player roles (connector, outside nuke, banana, rotator) and Vitality won more than few tournaments.
But they can't be first as long as player who plays most important positions looses way more duels than he wins. They can win tournaments.
To add to it, with such wins and apex playing positions with such high engagement - his rating is INFLATED. His actual rating is lower than 0.9, if we look at other cases where player move from those positions and to those positions it's probably about 0.1.
No one can be first while having that, then can spike but not hold it, to abuse apex all you need to do is spend first 5 rounds throwing all 10 flashes in his face, then his mental instability kicks in and you are playing 5v4. Zywoo is a God, but even a god can't win many 4v5.
Also, support players don't drag behind too much, HLTV sees anything under 1.0 and think it's a bot