it's possible that titan shares the same point of view on tempering as garuda, she seemed to treat it at the worst punishment she can give, and was very much aware that it was a fate worse than death, remember that she only attempted to temper you when you REALLY angered her by trying to kill her, she was perfectly happy to just kill alphinaud and cid. the only primal we've seen with a "temper as many as possible" attitude is ifrit, and that completely fits with him being the embodiment of fire since it's natural he'd want to consume as much fuel as possible.

I guess it kind of makes sense, if a primal tempers someone, there is no difference in mindset between a tempered person and a beastman, so they would have no reason to treat them any differently, most likely, the idea of having a non ixal/kobold under their protection would make garuda/titan sick

as for ramuh, I get the feeling like his immediate tempering of the sylphs was a bit of a knee jerk "OMG GUYS! YOU NEED TO STAY WITH ME WHERE IT'S SAFE!", and attempting to temper the other sylphs is an attempt to get them back in the sylphlands and under his protection, frixio even points out that ramuh won't do anything as long as you don't do anything to him or his sylphs (which suddenly makes the sylph faction quests seem like a VERY BAD IDEA)