I‘m sorry @Rach7291, that sounds so tough. Have you ruled out any possible physiological causes? Sometimes the whining and general grumpiness is due to feeling unwell for some reason - teeth, ears, reflux etc? If she won’t spend time on the floor, and seems to get distressed over it, maybe check in with the GP?
That said, they absolutely do go through a phase of being a bit of a nightmare around this time. It will pass, like PP said, but in the meanwhile, focus on finding workarounds that will make your life easier. So, if she hates nappy changes, is she big enough to try a pull-up? Could you buy a mat you can strap her to? Or try a new ‘hold’ for getting it done? There’s definitely some on the internet.
How does she sleep? If she goes down heavy, maybe brush her teeth at night then? Do you use one of those finger brushes? They can help. Don’t worry too much about it either, if the day is getting too much for you.
Is she in childcare? That can help with her learning to be social. If not, loads of playgroup/baby classes might help teach her how to play, and give you some respite while you chat with other mums. She’s still very little, so please don’t think this is her ‘personality’ yet! She may well surprise you soon and change a lot with her next developmental leap.
Finally, wherever you can, take advantage of those moments for self-care. Whatever works for you. Good luck! It’s hard! xx