Author of Kings Maker literally went out to perfect everything. Out of Control was kind of overdramatic and dragging itself way past the finish line. BL stuff is rarely really good. I dropped many stories that were 50+ chapters because no plot or character development happens. Heard of unOrdinary? I read 40 chapters of literally no plot and suddenly at 60 chapters the real plot happens? wtf? It's only HALF WAY completed.
Kings Maker isn't finished, she plans on having 100+ chapters. Just season one is over. Plus, if you read the epilogue and interview, she planned EVERYTHING and made sure everything was perfect. I think it should meet somewhere in the middle.
BL stories with a basic plot shouldn't be super long because it will drag and drag and start to become annoying. Example, Sekaiichi Hatsukoi is being drag just to dragged. There is no excuse for that manga to be continuing--he's so stubborn that he doesn't want to say I love you to a guy he is clearly still in love with.
It's so hard to find BL mangas/webtoons that are just the right length and have great plot development these days. Some BL mangas are either really short where the plot eventually crumbles at the end or some are really lengthy but the plot just goes round and round.
For example, I really love King's Maker since it has such a plot and character development and all of that in 37 chapters. The author really snapped when she wrote that. On the other hand, stories like Out of Control loop around so much that at the end, it seemed like the author just finished with whatever she had. I definitely appreciate her work but I wish the story had been thought out more.