I have always been on many occasions with bonuses, contests where things in the casinos have not gone very well for me, I don't know if this is perhaps a casino strategy to make you lose quickly, but that's the business, I have also seen that there are players who manage to overcome everything that is asked of them and manage to withdraw, the casinos are designed for all types of players.
I don't think any bonus hunter will overly complain if their meet a 1x wagering requirements on the bonus balance for withdrawal and if there is any winning the same amount of wagering also covers them too, this is why we have some form of support line and what not to take as a bonus, because any bonus that will require an 5x wager or above is already a sink road for the gambler and should be avoided at all cost, and that is why many of us always look away from bonuses since there almost often lead us into a more bigger challenges trying to meet their wager requirement that have often time lead to further loses in reality.
So as a gambler, I think it better to avod those bonus rather than losing your entire balance trying to meet their requirements, so at best we must remain thankful to those casinos that have given a low wager requirements because that way player can easily pass through them and come out with something tangible for themselves at the end of the day.