Sorry if you've seen this before, but it seems I need to repost it at least twice a year.
If you have a 'squick', such as being grossed out by anal sex or pee play, look at the story details and avoid any with codes for things you don't like. Hate lesbian werewolves? Then don't read lesbian werewolf stories. Simple.
If unfinished stories frustrate you, each incomplete work shows "In Progress" or "Incomplete and inactive", usually highlighted in yellow.
Only you can stop you from reading things that upset you.
As an analogy, if you ignore the label and eat soap instead of candy, did the soap company cause the problem?