@Ange_Mayao hello, I saw this post. Being a good writer takes time and practice. Hindi ito agad nangyayari. It's something you really have to work on over the years.
Also, maraming kilalang writers ang nakakaranas din ng rejections, na minsan, walang tumatangkilik ng gawa nila. But they just continued, together with marketing their books sa tamang audience at tamang paraan.
Get some rest muna and think about it. Don't let failures make you stop completely. Kung gusto mo pa rin magsulat, go. Kung ayaw mo na talaga, we will respect your decision.
P.S. anong book ito? Kung makaluwag man financially, sana mabili ko.