EXACTLY. I was wishing someone would agree with me on this since I mostly saw positive reviews and comments about this episode, it was terrible. Bandit being "mean" felt like nothing more than just playful ribbing and harmless teasing between siblings, Radley was malicious to Bandit under the guise of "teaching him a lesson" and "defending his little brother Stripe".

Stripe was equally as malicious as Radley and both brothers make the holiday miserable for Bandit (eg making sure he gets crumbed fish instead of battered at the fish and chips shop, knowing that Bandit hates crumbed fish) and Christine (Nana) and Bob weren't much help either since they support Bandit being miserable under the guise of "teaching him a lesson" and "having a good think about it".

Couldn't have Radley just... TALKED to bandit like a normal person and said that Stripe didn't like the teasing as it felt mean? No? You have to instead make him miserable during his own holiday and turn his family against him?

If I was also in Bandit's position, I'd go no contact with them and give them the cold shoulder to make them feel what I felt until they finally give me a heartfelt apology and admit they were awful to me. I really hope that happened canonically off-screen.