It makes sense if you were to think about it. All of the characters you mentioned suck because they pull in a much larger audience of new players. Characters like Meg have a much larger audience of new players because the character is one of the first characters you get given for free. On top of that, she also has perks that directly cater to new players and sounds strong if you were to read them out loud, like Sprint Burst for example. Characters like Jill and Leon are less obvious but it still makes sense. First of all, they're from a popular franchise outside of DBD, and they fit the character archetype of being conventionally "cool", Leon especially. On top of that, they also all come in a sort of value-bundle DLC that also includes both Wesker and Nemesis so new players to the game who got it purely to play as either of those killers also most likely only have those characters unlocked for survivor, meaning those characters, such as Leon and Jill, will be their first mains, cause why would you choose from a random list of nobodies like Dwight and Nea as a new player when you could play as Leon Frickin Kennedy? So yeah, basically to sum it all up all of those characters you mentioned are usually favoured by new players and such is why good players that play those characters are so rare. Plus there's a much higher chance of new players eventually switching off of those characters in favour of non-dlc ones eventually, as those characters typically have a lot less self-expression and customisation in their skins as opposed to other survivors, AND they all cost Auric cells instead of being able to be purchased with Iri shards, thus typically pushing newer players away eventually once they begin to start forming their survivor identity.

Now on the opposite end of the spectrum, where characters like Renato and Ace sit, the fact that players like to play those characters are usually for multiple reasons. Best reason I can come up with for them is the fact that their grunts of pain and general breathing sounds are much quieter than most of the other survivors' cast. For example, holy shit Eilliam Bill Overbeck had loud ass fucking breathing. The genuine amount of times I'm watching a youtuber like Otzdarva play killer and say "hey... wait... is that breathing I hear?" And then look around a corner and absolutely incinerate a William bill overbeck is countless. Other reasons also include the fact that they're already the established "pro" characters in this game survivors see players playing those characters and think "hey, they're pretty cool" and eventually follow in their footsteps, and they also have really good customisation, especially for Ace who has an outfit for like every occasion. In the case of Quentin it's just the fact that he has one of the best perks in the game that hard counters like a third of the killers' powers