What the #@$%

My nearly 3 year old is deliberately pooping on his bed. We've tried potty training every time I think he's ready, but after one or two trips he refuses adamantly and we take a little break. My reason for posting is to seek perhaps help from parents who've encountered a similar issue and gotten past it, or to commiserate with parents who are in the throws of a similar issue. He's been spoken to and timed out but it doesn't seem to be making a difference. It only seems to happen at nap time as well.. So far anyway. Please help me 😂😢 **Edit to add that his potty is in his room when he's in it to sleep, and potty training is slow going.