Avi K, the way you’re speaking about chassidus I don’t think you’ve had a real taste of it. The line you’re quoting is from Lekutei Moharan, and it’s one of only 3 mitzvot that the Rebbe described as a “mitzvah gedola” so it’s not just something stam, there’s something very deep behind it.
Besides? What’s the problem with singing and dancing? Tehillim says “ivdu et Hashem b’simcha, bo lefanav birnana” Do you know better than David HaMelech? I know somebody who thought they did – his wife Michal. She criticized him for singing and dancing to serve Hashem and the pasukim tell us she never had another child (though I believe some hold she had one more child which she died in birth).
It’s funny you compare emotional joy to a dog. It also says in tehillim 73 וַאֲנִי בַעַר וְלֹא אֵדָע בְּהֵמוֹת הָיִיתִי עִמָּךְ
David HaMelech compares his service and level to a beast. Rashi says that even so he still he didn’t budge from Yirat Shemayim.
It’s fine if you don’t feel connected to chassidus – but it’s really sad that whatever aspect of Torah you do feel connected to is so weak that you feel ok denigrating those who do.