。。
Let go of my arm. I can't stand being touched.
Literal
Arm [object-を] let-go. People [locative-に] be-touched [to-には] tolerance [subject-が] cannot-become [explanatory-のだ].
A sharply worded aversion declaration. 離す (はなす) 'to release, let go' — often confused with 話す ('to talk'), same reading. 触れる (ふれる) 'to touch' is the verb; its passive 触れられる = 'to be touched'. がまんがならん is the rough negative of がまんがなる ('to tolerate, endure') — ならん is the rough/masculine contraction of ならない ('cannot be'). A high-intensity rejection of physical contact.