That sounds very challenging and exhausting. Toddlers can be difficult even under the best of circumstances. You need to have him evaluated by his pediatrician to help determine if this is normal toddler behavior or whether he should be referred for further evaluation.

Setting and sticking with boundaries is key. Don't threaten something unless you plan to follow through. Trying to remain calm and putting yourself in timeout can help diffuse tantrums. How is his diet and sleep? Those can also be causes or symptoms of other issues.

Good luck!