Go to your embassy straight away and see what they say about getting you a new one/temp emergency obe or an official letter of explanation/certification. That's my suggestion to be on the safe side. But as picture is still legible... and as long as bio page and book itself is not extensively damaged .... you should be olay. But again... go to embassy/consulate to make sure
Question.... would you complain in the US... or anywhere on the EU? Sure you would. So what makes Thailand so "entitled "? Their house their rules ...yes. Abide by them? Yes. But there does come a point where even my Thai friends shout back at those not doing their jobs. Personally... I don't. I stay out of it and follow the queue. But I do laugh even if only quietly to myself.