切る => Give up, stop... N3
Happens next
切る/切れる/切れない => to do something completely to the end/unable to do; too much to finish/complete N3
ぶる => Acts like A, pretends as if A N1
Adjectival, Descriptions
たぶん => Maybe... N4
Speculation
ぶる => assuming the air of; behaving like; to pretend / act like ~ N1
ぶり => style; manner; way​ N1
たぶん => perhaps; probably N4
[切「き」]れない => Can't finish/complete A N3
Potential, Possibility
~ぶんには => If it's just within range...then N1
Scope
~ぶんには(~分には) => as long as ~ N1
~ぶん (だけ) => in proportion to; just as much as N1
Related, corresponding
ぶりに => for the first time in (period of time) N3