1. Do you get vexed up at the player?
2. Do you take it as a common loss by the team just like other days? or
3. Do you curse the player for that?
Definitely I would be so vexed up on that player actually, I remember when a player in my team played out of what was expected I got up from the viewing centres and left, and it's a huge loss though cause they say to whom much is given much is expected of them, so the player ought to do his best in making sure he does his best during the match and making the whole team and fans proud.
We all expect our teams to do better so we could have a bragging right when discussing about football with other team's fans but we shouldn't forget that errors is a part of football that can't be dismissed. No player will intentionally want to dent his career profile with a costly action that could lead to blow on his team but then shits happens, and so we football fan should learn to consider and understand that it's not an easy game and that it's also not error free.
In the game between Colombia and Uruguay in the World Cup qualifiers, an own goal marked a destiny for Colombia, because they were winning, the own goal made Uruguay equalize and after that came Uruguay's other goal, almost at the end of the game Colombia scored the equalizing goal and when everything looked like a tie, in the extra minutes Uruguay's goal came giving them the win, then it could be said that an own goal does have a great impact, only hopefully nothing happens to the player who scored the own goal, just as it happened to Andrés Escobar who scored an own goal in the USA94 World Cup and was killed when he arrived in Colombia.