Is it okay that I don’t like my dads girlfriend too much?

I mean she’s alright and she is kind, caring and treats me like I’m one of her kids BUT she’s loud, too crazy and way too outspoken sometimes. She always points out peoples’ truths sometimes and she always had to open her mouth. When my first first started dating, I HATED HER. I was very rude, disrespectful and hostile towards her and my dad wasn’t having that and called me out and sent me to my room. He did warn me that I was going to be seeing her a lot a lot and get ready for a lot of changes. At first I hated when she came over every day or couple days a week and spend the night. I would try EVERYTHING to get rid of her but it never worked. There’s times that she called me out for my behavior and I yelled at her does she’s not my mom and She don’t get to talk to me like that. But I ticked off my dad, his face got red and yelled at me to go to my room. I got scared and ran off. He didn’t have to yell. He said I didn’t have to lie her but I need to respect her and he will not let me disrespect her like that when he’s around and she doesn’t take crap either. I gave up.
He said back then she’s going to be around for a long time and her family. My aunt even asked back then, “How do you like your new family?”
New family?? I was 12 at the time.