Mysteries are Hard

So it'd be one thing if I were writing like a fantasy novel, or sci-fi or ANYTHING straightforward for that matter, but no, I decide to write a mystery thriller. Honestly plot wise, unless you're a dude like Scott Lynch or George R.R. Martin or Neil Stevenson, who write insanely complex plots, mysteries are the hardest to plot because the plot needs to be complex and relatively elaborate...if you're trying to write something not garbage that is. But regardless it's hard, because you know how it ends but you need to obscure the ending while leaving hints, it's annoying as fuck but hopefully the end result will kick ass.