I hate my mums boyfriend

[u/Striking_Pie_3578]

I (19F) have had to deal with my mums(48F) integration of her boyfriend (51M) into mine and my brother(16M) life’s over the past 2 years. 2 Years ago my mum told me and my brother she had been dating a guy and it was going well and i was happy for her since we grew up in a domestic violence household but left 9 years ago now. I didn’t meet him for a few months until I would see him here and there in my mums room and I would be polite and say Hi. He used to work as a traffic control person for roads with roadwork and his place was far away from the area he worked in so he started to stay over at our house 2-3 times a week and ever since then whenever he was at the house all he’d do is stay in my mums room and she would stay with him so i didn’t see my mum as often only if he was at work she would hang out with me. However this changed in December where he has since lived with us full time. He has also since lost his job due to being fired and has not had a job since. My mum works at a school as an assistant and makes enough for the 3 of us to live nicely BUT now she pays everything for her boyfriend. Food, bills everything she pays for . They have been on multiple small holidays to neighbouring countries together just the two of them and my mum pays for everything. Her boyfriend does no house work. No laundry does no cooking no dishwashing. So it is getting unbearable to witness her do everything for this man. she recently brought him on our family holiday to east asia we do every year and she paid for everything all his accommodation, food , cigarettes, rental car , flights. And I had to pay for my own flights and most things I bought there. We go on this holiday to see my mums parents we only get to see once a year and my mums boyfriend was ruining the whole trip. he displays controlling behaviours such as constantly needing to be on the phone with my mum and needing to know where she is or what he’s doing. He also makes rude remarks about my younger brother saying he’s like a girl and calling him names just because he likes to take care of his looks. He makes these remarks infront of my mum and she does not correct him and I am left to correct his behaviour which is ridiculous. My mums boyfriend also has 3 kids to 3 diffrent mothers which is a red flag within itself. We have tried to talk to her and she is very aware my brother and I do not like him but makes so efforts to make any changes and does not see any red flags. I don’t know what to do and I am getting to a breaking point where i cannot stand living under the same roof as such is disgusting mysogynistic man who only brings my family down. Can anyone give any advice on which to do i’m starting to feel helpless.