SOS terrible twos

I am having the hardest time with my toddler. He is almost 2.5 and throws the biggest tantrums. It sounds like an exorcism is happening in our home. At night when it’s bedtime he screams and kicks for 30 minutes to an hour even though we keep the same bedtime routine and he knows what time bedtime is. It’s very very rare that he’s smiling and happy and I’m exhausted from dealing with these constant tantrums. How did you guys make it through? I also heard 3 is worse so I’m extremely terrified.