Even if the speculation of swapping picks was true, you don't know what else was involved in that trade. You don't know the exact retention that was involved. You don't know if other pieces or picks were involved going back to Ottawa.
And no, trading back to 25th is different than trading back to 16. It's all about where the prospect tiers land in any given year, and 2022 was rather weak in the 1st round, and had tier separations at 5 and around 20. So in a trade down from 7th to 16th, you may not get your first choice anymore, but you wouldn't be losing significant prospect quality. Going to 25 means you're dropping down a tier.
Murray was not a dead asset. He may not have held as much value as his cap hit, or even his cap hit after retention (which is why he cost picks to move), but he still held value as a player. The return for taking it on isn't bad. A lot of fans just got worked up over tweets that told half the story, or were spinning unrealistic fantasies for clicks.