Terrible Twos!

Is anyone else really struggling with naughty behaviour?! My son is going through an awful stage and I’m struggling to deal with him. Today alone he’s slapped me around the face, poked a toy into my eye in a temper, smacked me about 10 times throughout the day, refused to eat his dinner, shoved and snatched from his little sister etc etc etc it goes on. And I can’t cope? I feel like I’m yelling at him 24/7 and I feel horrible about it 😭 😭 Any tips would be welcome or even just someone to tell me is not just me because I feel like the worlds shittest mother right now