Help for mill/n'zoth deck

Recently i moved to wild because i got bored of standard and i chose a n'zoth deck to play. My winrate is lower than 50% and can't climb past rank 8, even tho i would reach rank 5 in standard in 3-4 days. I would like so tips, couldn't find a guide after preparation nerf, thus i don't know if i should still craft it. 60% of my games today were against secret mage and big priest.

### Mill N'Zoth
# Class: Rogue
# Format: Wild
#
# 2x (0) Backstab
# 2x (0) Shadowstep
# 2x (2) Eviscerate
# 1x (2) Gang Up
# 2x (2) Lab Recruiter
# 2x (2) Sap
# 2x (3) Coldlight Oracle
# 2x (3) Fan of Knives
# 1x (3) Shadow Strike
# 1x (4) Elven Minstrel
# 2x (4) Spirit of the Shark
# 1x (4) Walk the Plank
# 2x (5) Antique Healbot
# 2x (5) Rotten Applebaum
# 2x (5) Sludge Belcher
# 2x (6) Vanish
# 1x (9) Valeera the Hollow
# 1x (10) N'Zoth, the Corruptor
#
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#
# To use this deck, copy it to your clipboard and create a new deck in Hearthstone

I am really sorry if this is not where this thread should be.

If the goal is to get better with that deck specifically I can't really help, but it seems to me mill rogue is terrible for laddering(slow + bad matchups against the field: https://www.vicioussyndicate.com/wild-vs-data-reaper-report-18/), so my advice would be to pick a different deck.