Forgive the whataboutism, but Guts, the
posterboy for Berserk Mode, despite
being guided by purely violent impulses, is able to
strategize and counter Grunbeld with his typical level of skill,
even tactically wielding his arm cannon. Nothing ever says that a character under the effects of a Berserk Mode is guaranteed to be completely incompetent; in fact, the page explicitly asserts that
(1) "
Often times people will lose massive amounts of intelligence",
(2) "Someone in a Berserk Mode
may not have much control over their actions", and
(3) "
Possible Uses [include...] Aggravation of
reaction and
feelings".
Toji determining how to effectively carry out acts of heightened aggression in service of rampaging instincts is not an anti-feat, far from it.