Uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuugggggggggggggggggghhhhhhhhhhhhhhhhhhh!!!!!!!!!
Off-key singing
Bad overly long gag/exchange of dialogue
Annoying overly long gag
More off-key singing (from both characters this time)
Stupid joke of SpongeBob being oblivious to someone's pain (that he causes)
More off-key singing
Gross-up close-up (which I don't know how I feel about)
The same annoying overly long gag as the last one except from the other character this time, and even longer
Maybe a few other things
UUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUGGGGGGGGHHHHHHHHH!!!!!!!!!!!!!!!!!!!
A bad combination of these negative factors creates one of the most annoying episodes ever, and this is, no doubt, the most obnoxious episode to listen to.
Once again, UUUUGGHH!
Alright, all that asside, in the episode's defense regarding one of the big complaints, I don't think SpongeBob has any malicious intent. (Skip my parentheses in this defense if you want to avoid my conspiracy-esque theories I threw in, and get my points)
"What a lucky break, now I have a captive audience!"
All that line means is that he knows someone is listening to his song and can't get away. (I say someone because... after A Pal for Gary, I've learned that the depths of SpongeBob's stupidity knows no bounds, and that at times, he can't tell what's in front of him. Here, he doesn't know that Squidward is the one being held captive)
"Um, Squidward could you keep it down please? I'm trying to find my starting pitch here.
The joke is that SpongeBob is oblivious to Squidward's pain. (Going back to the last parentheses, with this quote now in mind along with the last one, I'm thinking that SpongeBob is convinced that Squidward and 'someone' are two different people, that the person he hears screaming is different than the 'captive audience')
Everything he does to Squidward is to get his attention, because apparently, he feels that he needs Squidward's consent to attend the choir, and he needs to show him his singing voice.
He even offers Squidward a spot in the choir at the end. That's a nice gesture, don't you think? Of course, he gets the lowest possible position, but SpongeBob didn't make that decision. The choir man did, which makes sense because, in this episode, Squidward is a terrible singer (save for one moment toward the beginning). The worst description I'd give SpongeBob here is that he is an oblivious and selfish antagonist who doesn't take a hint.
Speaking of Squidward's singing and the choir man's decision, there is one questionable line that caught my attention
"It is a high honor to be chosen for the Bikini Bottom men's chorus..."
High honor? Chosen? WHAT? Alright I could come up with a few theories on this, but I choose not to in this post. That line speaks for itself.
In regards to Squidward's character and his singing, there is one thing that slightly makes up for his torment: His unreasonably high ego. Yes! Thank you! Then again, maybe it's not so unreasonable considering apparently he was 'chosen', and he believes that's a 'high honor'... Well either way, I actually don't feel that much sympathy for Squidward here. The episode doesn't take itself seriously at all. I feel much worse for him in Cephalopod Lodge. Not that that episode takes itself too seriously either. But the negative consequences for being kicked out of the club in that episode are much more severe on his emotional state.
Oh yeah, one other thing I'd like to point out. SpongeBob suddenly uses an angelic voice. I guess he really just needed to find that starting pitch. And that is one of the very few pleasant sounds in the episode.
I don't even know what to rate this.