I believe it's not that OMWH sucks, but more about you not liking adult games with multiple playthroughs. Maybe try harem ones instead of this one?
Most of the paths are pretty straight forward to start and progress. At least one path (Vania immediately jumps to mind) was very easy to miss starting because you have to make 2-3 specific choices, or it can't start. And the choices weren't intuitive to me compared to other paths that I had no trouble starting. Initially I had a tough time figuring her path's start out until I dug into the code. Now that I know, it's easy.
Something that *might* be helpful could be a "How to start each LI's path" that just lists the specific choices to kickstart a path. Once on the paths, it should be pretty easy to follow them. As it's not a harem game, keep the MC in his proper lane or expect trouble.