Hmm you should rather be happy. The SSR weapon is easy to obtain in this event and the other items will help you a lot more in the future. 20 BP seeds, 100 gems and 50 misc items.
I got it already 2 times through drops and it's a joke that it's part of the gacha and the contribution since usually it's a summon inside the gacha.
I am not unhappy with it, It just was funny for me that the "main prize" from it was the very last item. The box had 11 items left and I had tickets for 10 pulls, I did single pulls just for fun and thats what happened