Our sleep schedule is atrocious

Ever since we transitioned to a toddler bed, he has wakes up every single night and crawls into our bed. We take him back to his room, lay down with him till he falls asleep, and at some point he comes back to our bed. Every single night.

We are trying everything to get him to sleep through the night.

We tried cutting out naps because he was fighting them anyway, but he just ends up napping from 3-5pm. When we try to put him down for nap at 12-ish, he refuses to the point where he’s screaming.

Naps are confusing, bedtime is a nightmare, and I am at a loss. Idk what to do or how to fix this. Has anyone else had this problem?