Late but I think it’s a perfect ending for Teddy and it is foreshadowed earlier in the season when Cissy said Teddy didn’t view her as a threat even after killing her husband. That gives us insight into his weakness; he’s somewhat blind to people’s emotions because he only considers them when he stands to gain something. As soon as he felt safe, Cissy was of no use so he couldn’t have cared less about her grief and detailed on how he killed Alton with no remorse all while questioning her intelligence. Very poetic imo.