Mine fights it too. I don't even try to do his full routine because he fights it the whole time. I just put him in his crib turn off the light, shut the door and walk out and he falls asleep within 15 minutes.
Your not alone mama! I feel like LO’s periodically go through developmental changes that makes it harder for them to go to sleep. Not sure if there has been any changes at home? My LO started resisting bedtime when we moved. I think it was his way to be in control. Anyways, it took some time, but we kept his routine is closed possible, and everything fell back in place.
It’s been harder to put my son down for naps, I think it’s just the age.