Why is my sister so bad at adulting that have nag and lecture her constantly and why does she blow up if I keep bringing it up for an hour?

So have you ever evaluated "your" skills or are you only focused on bullying others for what you do not have.

You are attempting to control everyone in your life from your child to the nanny to your sister to the dog.  You are failing miserably.  You plan to control the length of your sister's baths?  I think you have issues.  No, I KNOW you have issues.

How old are each of you? Do you live with your parents? You sound like you are trying to parent her rather than being her sister.

You have to stop. 

You're not her mother. If you don't like that she's a slob, woman up, move out and get your own apartment where you will do the housework "perfectly." Don't invite her to visit.

Raising her is not your job. It's your parents' job. If they didn't do it, well, too bad.  

I'll add that sometime the problem with things that aren't done properly is that either the instructions were inadequate or the parameters of a completed task weren't specific. "Clean up the dog poop" to HER may mean smearing it with three squares of toilet tissue. "Take some water, ammonia and dish detergent in a bucket and swab that down, please" is a little more complete, yes?

I can't she half asses everything never does anything right I want it done perfect I only pick apart her life to help her

🥴

Because you took all the parenting skills. 

I'd say sit back and relax. Eat some thc. She'll pick up where you left off miraculously. 

No. I'm so not joking. You and her are an even balance of your mother and father. What she lacks, you have. What you lack, she has.