Mother's condition wasn't improving at all. If anything, it seemed to be getting worse.
Literal
Mother [gen-の] condition [topic-は] a-bit-even wasn't-getting-better. Rather was-getting-worse seemed.
加減 is the word for 'condition, state' — specifically of health or of a physical situation; it's related to 加える + 減らす ('add + subtract'), conceptually 'how things are balancing out.' 少しも~ない = 'not even a little.' The second sentence uses むしろ ('rather, on the contrary') to introduce a stronger alternative, plus ~ようだ for a softened 'seemed' — the speaker isn't asserting deterioration as fact, only as apparent.