AITA for giving my step kids my parents estate?

I am 27 years old female, I was raised by my widowed father since I was 12 and he was the only parent I had, my mother was in a car accident when I was 6 and never woke up, my father was the best dad ever, he sacrificed his career for me, he could’ve been a billionaire now if he didn’t put me first, but he managed to be very wealthy, he was a great example of fatherhood, he was the best dad any girl could ask for, he was rich when he married my former step mother who is a mother of two teenage boys, the eldest is 4 years older than me and the youngest is a year older than me, I call them Tom and Jerry for a short, my father married their mother when I was 18 and they moved in with us, they were very nice but their mother was very rude, she looked down on my family and never liked my father, I found out she married him for his money, the marriage ended after 2 years, my step brothers were 21 and 22 back then, my father was depressed for some time but started to become okay again, he bought me a new car after the divorce and spent a lot of time with me, my step brothers left the house but wouldn’t spend Christmas or thanksgiving with us, my father was understanding and never said anything negative about them or their mother, they spent Christmas with us this year, my stepmother didn’t come with them, I was surprised when they came to the house, they had a little present for me, they were nice and we had a great time that night, they wanted to stay with me for the night but my father told them to go home, I was surprised and asked my father why he did that, he told me he didn’t want my step brothers in the house, my father passed away 2 months ago in a car accident, I was devastated but when the lawyer told me my father left me his entire fortune, I felt a little better, I learned my stepmother and step brothers were suing me for their share of the inheritance because they were part of the family and my father didn’t leave anything for them, I was shocked, I learned my step brothers told their friends my father left them nothing because I was spoiled and manipulative and my father was biased, I know it’s not true and my step brothers were lying, I was upset because my step brothers never cared to visit their step father or call him, they spent Christmas with us because they knew he was going to pass away soon, he was old, back then he was 56, they never visited us unless it was a holiday, they never called my father or me, I was upset and posted on social media my step brothers were lying, they never cared about my father and they never called him father, they were only after his money and inheritance, my friends commented and told me I was right but my step brothers friends commented and told me I won the lottery of being born to a rich father and I was spoiled, this made me very upset and I blocked them, I feel bad I said what I said but I don’t think I was wrong, I was telling the truth and my step brothers were the people in the wrong, they were lying and they were only after my father’s inheritance, I feel I can’t trust them and their friends, I am not going to forgive them and their mother, my step mother told my father she was going to make sure he regretted marrying her if he divorced her, my father was devastated when my step brothers said what they said, he was very sad for weeks, AITA for giving my step brothers the middle finger and for posting what I posted on social media?