Commentators are like goalkeepers: When they do their job well, people rarely talk about them. But when they slip up and get it wrong, they are prime fodder for a good kicking. It just goes with the territory.
You need a thick skin to stand in the firing line between the posts, and the same is true for those behind the mic. No matter how good you are, there will be days when you make a fumble - and then all you can do is put your hard-hat on and accept your punishment!
I've never underestimated how hard it is to be a commentator because I've learnt from my irregular dalliances with the audio/visual media that it is one of those jobs that is much tougher than it looks.
Talking about your favourite subject sounds like a great job - and it is. But doing it well in a way that connects with the millions of people listening is a bit of an art.