Can't take handball as a serious sport with refs like that.
If poor referee decisions can disqualify a sport in general, football would be long dead.
In fact, refs in handball usually impact the game less than a refs in football do. This is because of the amount of actions in a handball game, where it usually evens out over 60 minutes and the deserving team ends up winning in the end even if there were a few poor referee decisions. Situations like this one are quite rare, and teams being robbed doesn't happen that often.
In football, one wrong offside call at 0-0 (which happens all the time) can decide a World Cup final. Linesmen in general have too much power in football, they can completely decide games and even the entire league season. That's why I can't wait for all binary rules of the game to be decided digitally, like offsides, whether or not the ball was over the goal line or out of play.