Not listening/fighting everything

Is anyone else's toddler acting terrible recently? 😩 my son has been fighting me and my husband over literally everything out of nowhere. Fights sleep, fights going potty, fights even drinking water. Just straight up refusing to listen 😩 my patience runs out after 5 minutes of trying to reason and him yelling or whining or grunting. I end up yelling and feel so bad but it's all day everyday. I have another son 2 years younger and I'm worried he's going to learn this from his older brother and stop listening too 🫠 Please tell me this is just a phase 😩😩