Aside from a huge win against Salford, the back-to-back bank holiday weekends have heralded little joy for the west Yorkshire club, losing at the Crusaders on Good Friday before their defeat in France on Saturday.
The Dragons came out on top 13-12 thanks to Scott Dureau's drop goal, meaning the French side have gone through April unbeaten and are the form team in Super League with five wins in six matches.
The Giants could have taken a commanding lead at the top of the table but are now just one point ahead of St Helens ahead of their clash with Hull FC on Monday.
Brown says he has been left disappointed by his team's performances over the bank holidays and says they need to rediscover their winning touch quickly.
"It's been a poor Easter for us, tonight, we put in a great effort but we've had over 20 errors and at this standard of footy, you can't do that, especially against a team that is playing that well," Brown said.
"We need to look at our ball control, because it wasn't good enough tonight and in attack our support play left a lot to be desired, we had three clear line breaks and no one to back them up, which worried me most tonight.
"We have to look at what we need to do better to win games. I thought Lee Gilmour had scored at the end, but again it goes back to the backing up issue - it was a simple two-on-one pass situation with the full-back and we'd have scored there if he'd had support, but it wasn't to be."