Someone has got to put Thor out of his misery. That’s the setup of “Thor: Love and Thunder,” but it also becomes a larger existential question after taking in this middling installment, the latest version of “twee Thor” from co-writer and director Taika Waititi. While the Oscar-winning Kiwi darling’s “Thor: Ragnarok” provided an infusion of fresh humor into the MCU back in 2017, “Love and Thunder” proves the bloom is off the rose when it comes to Waititi’s cutesy take on the God of Thunder. “Love and Thunder” is the fourth “Thor” movie and the second co-written and directed by Waititi, who tea…
