Pywel is too large for one man to explore by himself. Perhaps that's why Pearl Abyss lets us swap between Kliff, Damiane, and Oongka in Crimson Desert. Each of them brings something different to the fight, with Damiane focusing on quick and precise attacks, Oongka using his size and strength, and Kliff using a bit of both.
While most players may barely end up playing as the other characters, because there's no real reason to, it seems fans definitely prefer one of the companions over the other. Damiane is unlocked pretty early in the game, giving you enough time to play around as her, but Oongka is only available after you've made significant progress. That, along with his slow attacks and lack of abilities, is probably why nobody really likes playing as him.
Scrolling through the Crimson Desert subreddit, you'll notice a number of posts about how annoying it is to play Oongka. Firstly, no one wants to get used to a new character after hours of playing the game. Then, there's a section where you're forced to play as him, and even get into a boss fight, most of which are hard enough while playing as Kliff.
"Oongka's fighting...
