Your third question: why does Srila Narada Muni condemn Srila Vyasadeva for compiling the Vedic Scriptures? Sri Narada Muni was the Spiritual Master of Srila Vyasadeva. A Spiritual Master has the right to chastise his disciple any way He likes. A sisya or a disciple means one who accepts the disciplinary action given by the Spiritual Master. Even although sometimes a Spiritual Master chastises his disciple as a fool or rascal in fatherly affection, it does not mean necessarily that the disciple is a fool or a rascal. You will find even in the statement of Lord Caitanya—He presents Himself as a fool designated by His Spiritual Master, but that does not mean that He was a fool. A sincere disciple feels it pleasurable when his Spiritual Master chastises him with calling him such names as fool and rascal. My Spiritual Master sometimes called me in that way and I remember that day always and feel transcendental pleasure.
By following His footsteps, you can approach Nityananda Prabhu. Nityananda Prabhu approached Jagai and Madhai at the risk of being personally injured and still He definitely delivered them. The world is full of Jagais and Madhais; namely drunkards, women-hunters, meat eaters and gamblers, and we will have to approach them at the risk of insult, injury and similar other rewards. To face such reverse conditions of life and to suffer thereby the results of actions is considered as the greatest penance and austerity in the matter of spiritual advancement of life.