i know its a big hassle that they offload you but they're right about "theyre just protecting Filipinos to be illegal"
although youve been here before, you still dont know what will happen next. you may have your plans here already...but hey if anything goes wrong with you here its still the philippine embassy you'll go running to.

yes you can go to sg to avoid being offloaded again to qatar, but be also aware that many "for tourist only" going to sg are being offloaded too in naia.

so better be careful and good luck