Compared to that kind of separation between emotion and action, a catastrophic outcome is still preferable.
Literal
That-kind [gen-の] emotion [and-と] action [gen-の] separation [compared-に比べれば], catastrophic [copula-な] result [gen-の] side [subj-が] still better [copula-である].
~に比べれば is the conditional-form variant of ~に比べる 'comparing with X' — 'if you compare it to X.' 破局的 'catastrophic' uses the ~的 suffix. ~の方がまだまし is a comparative structure where まし 'preferable / better than a worse alternative' carries a specifically 'lesser of two evils' sense — you're not saying it's good, just better than the alternative. である is the formal copula.