Unless your mindset is one of “it’s not enough that I succeed; others must fail by my hand”.
That said I could easily imagine doing some stuff like this as a teenager for giggles. There’s some small joy in being a minor troublemaker in a way nobody would actually care about. It’s not something I’d brag about though.
Even if we're purely selfish, wasting resources just to stick it to others is not really a productive use of our time.
Who in their right mind wants to stop others from getting what they want for it's own sake, or sees the quest for happiness as a competition?
I was pushing back on the idea that "homo economicus" or mainstream economics advocates for competitive sabotage. I have never heard academic economists advocate for this as a rational position.
If anything, the field is biased to over-emphasize positive collaboration.
The position of the parent post is some strange application of group competition for a scarce resource to happiness.
It assumes that someone's goal is not be be as happy as possible, but rather happier than others. This is the only situation where it makes sense to actively put in work to make other people more miserable.
Homo economicus would try get as much as possible for himself, or have others bear the cost (e.g. have society pay for roads but don't want to pay taxes).
They would not lower the quality of service for someone else out of spite without any gain for themselves, let alone waste time on it. They would also understand this would rise the cost of the service they might potentially want to use in the future.
Only narcissists would feel the desire to fuck up a service out of spite and ruin it for anyone else, just because they feel bad for not agreeing to the deal of having to pay