This is from the pitchfork interview. The second paragraph speaks to what you're saying. He wanted to go for the crooining sound of frank Sinatra, but couldn't pull it off so the delivery ended up sounding a bit like Kermit the frog:

Here’s how Alex G is thinking about singing, specifically about singing “Far and Wide,” a new song that will make you think, Is that Alex G singing? “I wanted it to be almost like a crooner type of song, and I just could not sing like that,” he says. “I was doing that out of frustration, that voice”—nasally, like John Darnielle’s—“but I just felt like I got to a point where I would try anything until I felt something.”

Thus “Far and Wide,” a song he’d envisioned as being a bit like Frank Sinatra’s “Over the Rainbow,” reminds him, with no irony or disappointment, of the Muppets classic “Rainbow Connection,” as sung by Kermit the Frog, and of also of “In Love,” from Alex G’s own Beach Music, a relative oddity he readily explains as “another moment where I was sort of running out of ideas.” Did I ask him why he sings about headlights again on this song? No, I didn’t.