How long does terrible 2s/3s last?

pm

Am I the only one dealing with this? My son is extremely hyper 24/7 and is only on stop when he’s sleeping. Things only hold his attention for so long till he’s back to his wild bad self. He doesn’t listen, has intense tantrums, talks back etc. He’s acted like this for a year and a half now, and he will be turning 3 in February. I’m really just hoping there is a light at the end of the tunnel and I’m also not the only one to have such a disobedient toddler. I’m also pretty sure he has ADHD because his father does and he’s showing all the signs so far.