Yes absolutely! Declawing causing severe pain to your cat and possibly can result in aggression following the procedure. This is seen often. You are essentially removing the entire bone and flesh from your pets lower paw, which is like a mini-amputation. We don't recommend this unless absolutely necessary, which is often in cases where the cat is causing serious harm/injury to a debilitated/senior/sick owner and there is no other alternative for the cat.
It is best to keep Oliver intact if possible. You can also try out soft paws for cats, which are soft nail covers that can stay on for an extended period of time, protecting kitty from scratching you or your furniture.
https://www.softpaws.com/I hope that this helps and best wishes with your fur baby Oliver moving forward. Take care.