The show that spawned this one is miles better in literally every aspect.
Also, there is nothing to "compare" it to, it's an outright abysmally done show. The pacing was awful, the characters were shallow and unlikable, the jump from simple cars and motorboats to "GIANT ROBOTS" was jarring and poorly done, the entire concept of a "dark avatar" could've been done well but was so poorly executed that it put Energy bending to shame, the fact that Korra releases the spirts into the mortal realm after Wan had worked so hard to put them back due to their rancid hatred of humanity was idiotic, the love triangles were grating and horrendously unessicary, the Equalists were an interesting concept than was horrendously dumb, it took the entirety of the mythos surrounding the Avatar established prior in canon material and took a giant dump on it, every single progressive theme that was tossed into the show was poorly handled and practically crammed down the audience's throat (Wan's whole ordeal with the people vs the government, Korra and Asami's sudden relationship at the end of the series, the not-so-subtle race-relation issues established in the first season, ext.), the fact that Korra was already a competent bender in her toddler years while Aang struggled with two different elements in his teens, the fact that the entire struggle of Season 1 was predicated on the idea that Korra was afraid she wouldn't get to play Avatar anymore instead of something more serious unlike Aang who since the literal second episode was established to care more about the well-being of others than he was his own, ext.
Also, just because the show tries do delve into new territory doesn't excuse it failing to competently do so. Yes, it tried to tackle deeper issues, issues that are currently rocking the face of society, but it was handled in a horrendously fashion with an overall underwhelming conclusion.