I'm new to showing - took the hobby up 2 1/2 years ago. There's no doubt I've had mixed experiences and on a few occassions have felt overlooked but I've also had some lovely experiences too.
I'm more confident in the ring now and feel I handle my dog to better advantage than I used to. As a result I have started to be placed on occassion.
If we have a disappointing day, when the judge shows no interest, I put it down as experience and try to enjoy the day out regardless. For me it's a hobby but I recognise that for others it's more important than that and maybe that can cloud their judgement ocassionally - like others have said human nature 
I like this!
I've only been showing Toby a matter of months, just open shows and this is my point of view about it too. We've managed to be placed a few times & I'm over the moon when that happens but if we don't it's just a good experience and more lessons learnt for both me and Toby, plus I love going to shows just to meet others with the same interest and meet some pretty lovely dogs too!
