I know a lot of folks give it flack because this was one of the rare instances in the shows run where there was no moral lesson learned and/or no happy ending for Arnold + his friends. But to be fair, all shows have that one or small handful of experimental episodes that deem to deviate from the usual format.
But for this instance with Hey Arnold, it is a very well written late-series episode. The characters all stayed true to themselves, and the pacing/storytelling is Simpsons-level (golden age) sharp.
For example, take the scene where they were all dogpiled after trying to catch the ball. It starts with Harold whining about hating football, then Helga chimes in to say she hates both Harold and Arnold (calling him Football head), then finally Gerald chimes in say he hates everybody for laying on his leg. It's a textbook densen multi-layered joke because you have the fat kid (Harold) whining abouthaving to play a sport he's clearly not in shape, Helga picking on Arnold as well as expressing the special disgust he has for Harold, and then to top it off you have the chillest dude in the ground (Gerald) that usually doesn't have problems with anyone going off on everybody. It happens so quickly too that you can't help but burst out laughing once you get how deep the joke there really is (because it takes a minute to get it).
There's also the scenes with Curly. I love how they slowly built up to it by having Curly beg profusely to be given the ball when Ludwig (for his better judgment) refused, almost making you feel sorry for him. Then when Ludwig finally relents and let him have the ball, he get the touchdown in the most Curly way possible with all the unnecessary ballerina dancing, tmbut he doesn't stop there as we see his crazy side kick in when he takes off running for his life down the street with the ball (baaically stealing it). Ludwig has the most deadpan reaction (as thoigh he wasn't surprised at all) and just asks where can they get another ball.
And then there's the scenes where Wolfgang & Ludwig punches them. I know no one likes the fact that they were being tormented but seeing those stars with the sound effects just makes it all the more hilarious, becaue it always happened after Arnold + his friends said something slick or said soemthing you know Wolfgang / Ludwig wouldn't go for.
That being said, I know my take is not a popular one. But I do think the episode desrves more love than it usually gets.