The guy was upset and frustrated after a disappointing race. His coach had talked beforehand of the need for Webb to get better at putting sub-par races into perspective, so it's not really too surprising to me that Webb struggled to control his frustration.
Wejo stating "there was no effort to mock Webb in the article" is a little hard to believe. The article is full of loaded and judgmental language. It's one thing to say "Webb was upset," and another to say "Webb had a temper tantrum, a complete meltdown."
Additionally, the bulk of the article is lacking in newsworthiness. What's the point of the "workout #1, #2, #3" stuff, with "he talked to his agent for a while" in between? Salazar's athletes often do workouts after races. The article's implication is that Webb went out of his mind after the race and ran amok on the track for a full hour.
I think the purpose of the article was sensationalistic, and while it's well possible the Letsrun.com staff consider themselves supporters of Webb as a runner, it's a little hard to believe they're oblivious to the extremely mocking tone of their own article.