The demon king is old AF so his thinking is so old fashioned he can't fit it in his thick skull that Carl is his own person with his own experiences, he'll never be the Queen. She unfortunately passed and though they might share a soul that doesn't mean they're the same person. I don't root for their relationship but I can see that Carl does care and wants to care more but each time he remembers that everyone wants the Queen and not him except for Phil who never had a chance to build a bond with anyone but Carl.
The demon king is old AF so his thinking is so old fashioned he can't fit it in his thick skull that Carl is his own person with his own experiences, he'll never be the Queen. She unfortunately passed and though they might share a soul that doesn't mean they're the same person. I don't root for their relationship but I can see that Carl does care and wants to care more but each time he remembers that everyone wants the Queen and not him except for Phil who never had a chance to build a bond with anyone but Carl.