England vann á þessu ári Six Nations áður en ferðast til Ástralíu og berja Wallabies 3-0. þeir viðurkenndi 10 reynir í röð, þó, og Jones krafðist varnar framför.
“Það er ekki ósanngjarnt gagnrýni, það er gagnrýni,” sagði gustard.
“Ef þú tekur það persónulega, þá er það sjálf og leikurinn er ekki um okkur, it’s not about our ego, it’s about the players.”
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Gustard has since spent time with the New Zealand Warriors rugby league team and oversaw an England training session with professional judo coaches on Monday.
“I was looking at league’s defensive systems and stuff around the tackle,” sagði gustard.
“There are transferable skills from judo. We missed 80 tackles in the series against Australia and that’s not good enough.”
England host South Africa, Fiji, Argentina and Australia in November and December in the Autumn internationals.