kidsama

i agree, they are not mythological and do exist, and are in constant service of Waheguru.

I believe that Gurbani says that 'Gurmukh is the most excellent way' because it is only through human birth that normal souls can actually merge with Waheguru, I remember hearing that even the Devi and Devte wish they could have human birth to have the chance.

Its mentioned in Jap Ji Sahib too :

'Tin chele parvaan
Ik sansaari, ik bhandaari, ik lae di ban
Jiv tis bhavai tivai chalave jiv hovai phurman
Oh vekhai ona nadar na hovai
Bahuta eh vidaan.'

Scuse any mistakes please, I wrote it off the top of my head.

It's the bhaao ( read Love n respect) that matters.its good that u respect the bani and read it with as much proper maryaada as you can.... but if u refer to the story.. It's NOT fair.. 
If even after doing so many paath if a person is not getting what he wishes.. Then
1 He has to trust that he's better in jail. Life would have been worse outside. Waheguruji knows better .... 
2. He has to do it with utmost love n keep faith that Guru is 'Baikasaa da yaar" He would surely listen
As for u.. Haven't u felt any positivity yet doing Japna? 
If yes.. U have your answer. Maintain love in ur japna. Correct whatever you can but don't think that all you have done till yet is a waste
Haven't u heard the saakhi of Guru HarRai Sahib ji where an old lady was singing - Tu Paapi hum Bakshanhaar"  and he was loving it.... Similarly Sri Krishna was happy eating banana peels instead of the fruit at Bidar's house
 

Veer ji daas knows this shabad off by heart and used to read it alot before i got into bani nitnem but still try to sometimes when Guru Sahib does kirpa. 
 
Yes it is very important to read the Gauree m5 part and rahao as thats the way it has been written by Guru Arjan Dev Ji in Sri Guru Granth Sahib Ji Maharaj.
 
The story you have mentioned is i think Sant Gurbachan Singh Ji Khalsa Bhindrawales life that happened. So its true as daas heard this as well.