Agree with what Rosemarius said.
@haruha_raharu
The disorganization overall in the archive is a real problem. We are certainly aware of it. We're also working on a way to fix it. However, that's not as easy as you might think. Once we have everything in place to start moving stories around in the archive (in a manner similar to the way we can move topics around in the forum), we will be doing exactly that. The new working structure is already hashed out, but we need the tools to implement all this. The tool creation for this IS in progress (among many other necessary things being done). You are looking at literally THOUSANDS of stories spread across 22 subdomains that must be gone through so they can be properly categorized. That's a whole lot of work ya know. Once that's all done, it'll be very easy for those of you who dislike slash/yaoi to avoid it entirely. Think about it. A category that says either slash or yaoi is one you'd never click on, if you don't like to read the subject matter. Pair specific categories would be listed below the pairing/story type, so that can be avoided entirely as well.
As to whether or not a particular user tags his/her stories in a way to make it so that one knows definitely it IS a same sex pair story, is on the user, not the archive program or the admins and mods. It is the user who inputs the data and makes the form choices when uploading after all.
@TurtleHermit
Obviously we do not restrict who uploads what, and in what quantities here, as to pairing type. THAT is up to the individual author. If the author chooses to write het, that is his or her choice. If the author chooses to write slash/yaoi that is ALSO his or her choice.
You will find in the archive subdomains, for the most part, they all do have a subcategory specifically for m/f or m/m or f/f etc. The only ones where you don't really see this are the subdomains such as cartoons, anime, and books which have literally hundreds of subcategories, aimed at specific titles. So in those, sure, you have to look in the description to see what the story is about more carefully.
As to the bad writing you mention? You find that in any category. On any fan fiction site.