Attempting to help a elderly person without recognition? Why attempt?

My venting story for the day,
What I've been thru you have no idea! I have a Aunt that's 88 and lives alone.
About 6 months ago is when I came involved helping & caring for this Aunt's needs.Why I became involved with this Aunt was because,I was told by the APS and Police dept that my cousin beat and abused this Aunt.My cousin and her boyfriend was arrested and charged with battery and now waiting hearing.After I learned of this,I decided to search into this further and found many other issues as many Checks was wrote out & cashed by this cousin and attempting to sell the Aunts house,items was missing and sold and the cousin attempted to change the Aunt's Will as coaching,forcing her to do so.Once I learned all of this I asked the Police & APS to do a financial investigation.Both depts refused to do so on grounds that my cousin & boyfriend lived with the Aunt and may have used the funds to buy food is what I was told.They said,I had no proof how they spent the funds.I differed and said yes I have proof of how many checks was cashed in just a short time.I found my cousin wrote $400 checks stating house payment.What's this?The house is paid for!There is no house payment!I explained this to APS & Police with no financial investigation done.
I decided to take my Aunt to her attorney to explain all what I found.The attorney told me just be lucky you saved her house from being sold.I know 100% this cousin ripped the Aunt off with proof but,the depts careless.They all say I must forget and move on.Wow what a legal system with have I must say.The attorney felt my Aunt needs a DPOA.There I was the only feller willing to step up to this plate.I agreed to be her DPOA.I had no idea what a DPOA was I agreed because,the attoney felt she needed one.There was my first mistake.I learned having a DPOA is pointless.A DPOA or POA is only used for finger pointing if something would ever go wrong I learned.All I stated above happened 6 months ago.

Here I am today,
The cousin and her boyfriend is out of jail and moved out of state."Free birds" with a slap on the hands!Unfare this legal system is I must say!Photos of bruses and police reports of many past 911 calls and these two people is walking free wrong it is!
From all I stated above,I was forced to be this Aunt's caregiver & DPOA.Why I say forced?Because,no other family member was willing to help this Aunt.I contacted all members to help and all refuse.I'm on my own with this Aunt .It's a bigger job then what I ever thought it would be.I learned the Aunt's darkside.I learned she is very hateful and is why knownone else is willing to help her because,she's so hateful.What I did for this Aunt I recieve no recognition.If it wasn't for me she would be in a nurcing home by now.It's to the point to where I don't want to help her anymore because,of her hatefulness darkside.There's no gain in this for me helping her.I don't even get a thank you.But,if I stop helping her knowone else will attempt.Some say let the state take over.Sounds easy to say!But,will I sleep at nite after doing so?
This Aunt's desire is to live in her home alone.But,she refuses to spend a dime to help her keep staying in her home alone as life alert and other requirements.
I don't have the money to spend.She has the money but,refuses.I have this DPOA but,I can't spend her money as I see fit to help her stay in her home.I contacted Real Services they told me the Aunt has too much money to quilfy.They told me she needs to start spending money inorder to quilfy.She refuses to do so.My Aunt has me take money out of her bank account for her spending money for her because,she can't get out to do it her self.I also,do her grocery shopping for her.She eats way too much! and loses money all the time or giving it away to someone I don't know.I grocery shop for her twice a week each time it cost $90 "each time" for one old lady.Where does all her food go I have not a clue.She has no visiters that I know of.She writes a checkout for cash for me to cash for her so she has spending money $400 example.3 days later she has me do it again for her.That's $800 per month of spending money she gets.And she don't go anywhere.But,some how she's alway broke,hiding or losing cash.As I am her DPOA at her bank I'm starting to worry will I be finger pointed where her funds went?I keep recepts of all I spend for her .But,my Aunt holds,controls her checkbook.I sign as POA when I cash checks for her.I have her signature each check she writes.I'm worried will or can this backfire on me?Should I keep doing what I'm doing or stop all together?Because,I sure don't want to be accused of wrong spending down the road.My Aunt has very bad dementia.I was denied online banking to help manage her spending.I was told POAs are not allowed to has access to online banking thru Chase bank.And I'm not joint as I was told POAs are not allowed to be.How can I cover my butt?