。
I don't like your laziness.
Literal
I [topic-は] you [possessive-の] negligence [subject-が] not-pleasing [explanatory-んだ].
怠慢 (たいまん, 'negligence, laziness') — a formal word. 気に入らない ('not pleased with, not to one's liking') — the negative of 気に入る. んだ adds explanatory emphasis — 'the thing is, I'm displeased.'