How Do I Tell My Dad Stop Doing This …. I Need Lots Of Answers?

Ok so before reading this lemme tell you that i am 13 and a pakistani and there is no such thing as child rights ac or womens rite act…. my dad is very very srict and has made our lives hell…i mean he was in the army so its just my guess he is like that because he of military training … he doest even let us turn on the fans and a.c’s so we dont get used to it and if we do we get scolded… and most of the things he says r rite but his way of telling is not .. like he says to wake up early in the morning and i wake up 7:00 am (in school vacations) and give him breakfast everyday but one day i woke at 11:00 am he started scolding me and said that you never gimmme breakfast and its your daily routine bla bla bla and for about an hour he just kept on speaking and speaking … and every nite i give him dinner but he is like no one gives me food and all that ..he never appreciates how hard i work and what all i do for him…how can he forget about the past days ive been wakin up early….and i clean up the whole house (we live in a huge banglow so its hard to maintain) i know he loves us and has given us the best lifestyle and has given the best of everything and money(we thank him for that) but we cannot buy happiness with that . i do dusting everyday and when he comes home he checks and even if one speck is that he finds he starts scolding. same is with my elder bro he is 15 ..one strange thing is he never ever says anything to my younger bro he is 12 …. maybe because he is the youngest but he has to understand that no matter he is the youngest but he is 12 now …. all tgis started happening with us two ( me and my elder bro) when we were like 9 …. also he never ever had a good relation with my mom…they are always fighting mainly because of the different lifestyle and backgrounds….she is being scolded for turning on the a.c and no matter how much we clean the house he is not satisfied and always scolding my mom ( his mania maybe) he is always doing her adverse publicity in his family …. she would do everything he said ….for about the first 13 years of marriage but then they seperated twice in 3 years but my mom came back cuz of us .. she didnt want us to be fatherless or spend a poor lifestyle so she came back for our sake….but my father didnt change … he is always like i will divorce you (but everyone knows its a fake threat and he never will divorce her) but my mom has grown strong now she does wateva she wants but one thing is that she has been put on antidepressants so it has chnged her lifestyle … she sleeps all day and wakes up all nite …. other than that my father and mommy doesnt stay in the same room … she lives in my room… they do talk i mean like they normally talk and sit together ..discuss things like normal people but sometimes it always ends up in a fite cuz of ma dad also because of the things he says bout my mom our uncle and uant thinks hes rite and my mom is wrong…. and also they have had such serious fights that he had slapped her like 2 or 3 times in the past 3 years ..now the problem is i am toooooo shy or rather scared to speak infront of my dad …i cannot defend myself or my mom …. and keep listening to him …my elder bro is tooo arrogant that he is always arguing with dad but only for himself … he has become like psycho(not literally) but hes always talking about running from home … we feel like suiciding … i am so super depressed and i cannot share it with anyone not even my mom cuz then she will get depressed (me and ma elder bro are like very close) so tell me how do i tell my dad without a harsh tone and polite manner with confidence to stop doing it and without any tears in my eyes …..i need enough power to speak and i need support (ive tried one time but i wasnt confident and he ignored it )
p.s he loves us but he is a maniac and thats why he does this and we also LOVE him but dont LIKE(there is a difference in love n like) him that much
and my mom hated him but lives here because of her children