I’m a horrible mom!😭

So I have a 3 year old and a 7 year old son and I’m a single mom I work 5 days a week and they go to day care and school while I’m at work and then I get off work and pick them up and all they do is scream and cry and argue and fight and they don’t listen to me unless I scream at them and then they still do the same thing I haven’t cooked a real meal at home since I don’t even remember when it’s always drive thrus or take out I try my best to find a baby sitter on the weekends for at least one of them because when they are separate they are literally a whole different kid!!! But together they are chaos and I honestly don’t think I can handle it anymore it’s like the same shit every day I have absolutely NO free time and if I do I don’t even know what to do with it so I clean and clean because my house is a disaster all for my kids to come home and ruin it!! I know they are kids but I feel like they should be just a little bit more considerate I tell them to clean up and I try SOOOO hard to be nice but I swear they do not listen unless I’m mean and I hate being mean because I know that they are humans and they have feelings but if I didn’t then nothing would get done half the time I end up having to do it by myself anyway because they don’t listen to me. But then I go to my moms house or my grandmas house and all they have to do is ask them nicely when I try that they don’t even look at me or acknowledge me 😭😭😭😭 I’m gonna go crazy I don’t know what to do....