。
It's not that I dislike farming at all.
Literal
I [topic-は] never farming [subject-が] disliked [reason-な] reason [copula-じゃ] not.
決して~訳じゃない ('it's by no means the case that') combines the strong negation 決して with ~わけではない ('it's not that'). The speaker clarifies a misconception: they don't actually dislike farming. 農業 (のうぎょう, 'agriculture, farming').