。
Her brother complex is really a problem, isn't it.
Literal
Her brother-complex-ness [to-にも] troubled-thing [sentence-final-ね].
ブラコン is the abbreviation of ブラザーコンプレックス ('brother complex') — unhealthy attachment to a brother. ~っぷり is a suffix meaning 'the degree/manner of doing ~' — ブラコンっぷり = 'the extent of her brother complex.' 困ったもの ('a troubling matter') is a set expression for resigned exasperation. The whole sentence is sympathetic gossip.