My uncle is purposely running out the money that was left after my grandpa's passing. How can this be fair?

He stopped talking to me after the funeral. We never had any issues and we always trusted my uncle, I was raised in the home with him and my grandparents my whole life. My mom had me young and she passed when I was 19, no father or any family on his side. My uncle and I were extremely close, like siblings. I looked up to him and I even turned against my mom bc he said that was the only way she’d get better. She passed just a week later. Just short of 30 years old, I’m over that guilt). I cared for my grandpop who had dementia. I lived in the home, I did absolutely everything one would have to do for someone who lost all cognitive abilities. I never wanted this to be about money, but my uncle took a “loan” out on my grandparents home a few years before my pops passing, and was supposed to have paid it back within a “few years” - father son agreement. Finally my pop started to get bothered and ask questions and he would have me record his end of the conversation (makes sure it’s legal). He didn’t trust his son but lost the moxie to tell him or stand up to him. I wanted to believe my uncle wasn’t going to do the things he did but the shrew he is with, the only girl in my entire life who I never got along with. I was right about her. She ripped my grandparents off and they left me homeless. Literally on the street. Then told my oldest son I am on drugs and need to lose everything, sure there’s always 3 sides. And there’s much more to mine to add. But my uncle won’t show me any accounting and he wants to spend all the assets so that his mother. My grandmother. Winds up having Medicaid kick in. When he could’ve allowed me to continue living in the home. She is in INDEPENDENT LIVING, she didn’t want to go. He moved her 4 hours from any family. She hates it. I can’t even see her. But bc the houses are selling for a lot, he wants to sell it. Give it all to the place she is at. Then she has nothing and nothing left at all but yet he paid off his loan with pop's insurance money. I have so much proof, even the doctor who  asked what date he actually diagnosed was with dementia and anything my uncle had him sign, was AFTER that date. He counted on me having nothing and having to be in debt for the first time in my life. I hate to say it, but had I known this. I would have charged. My grandpop would’ve insisted. He retained his long term memory until the end. So the moments of clarity were just him. He was so sharp. He kept saying I’m so sorry I made a mistake. I’m so sorry I thought I could trust him. Even he knew. But that he got to forget. thise wounds my uncle poured salt on…. I get it. I understand he’s caring for my grandmother. But I mean like 2 mil when the house is sold and about 400-500k in cash not including his fegli insurance policy, I asked to please help me so I could buy a trailer so I wasn’t homeless and to help me get my teeth pulled so I could get dentures so I could feel more confident and work. Since my teeth are badly decayed and I. Get abscess too often I get fired. I begged a man who has 3 homes not including the house of my pops that his wife will profit off of. how is any of this fair. I need a little help. I’m not asking for dental implants but I have to have a heart valve checked and if I can’t get dental surgery, that’s it. So someone I trusted with my life. Told me “not his problem.” My heart hurts each time I relive it. How can that be fair? I’ll be dead before I’m 50.