I think they chose very extreme examples to be honest.
Dude with beard wasn't getting any positive feedback not because of his beard but due to the fact he was moving to Pakistan forever, otherwise I think that girl he met was interested, just not particularly enamoured with the thought of leaving everything behind and moving to Pakistan with him.
The GP well she was still grieving over the loss of her dad and I reckon she had issues about giving up her freedom and independance and being tied down, going by the way her brother behaved she didn't have much of a positive role model for a man of her generation. Also the examples of rishta's that she was getting were completely unsuitable.
The young girl, well she'd just started out in her search and her mothers reasons were valid, she herself wasn't terribly attached to the rishta she did get.
The hindu one was very very funny;
The guy well he was just so immature and full of himself
That girl who got married was so cute and her mum was so adorable.
The other girl well she was clearly hung up on that 'friend' they'll prolly end up together or she'll realise a some point he isn't committing......
I hope they all end up with loving spouses worthy of them. And live happily ever after.