切る => Give up, stop... N3
Happens next
以外 => with the exception of; excepting ~ N2
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
手前 => considering; before; in front of; one’s standpoint N1
のが上手 => to be good at doing something N5
のが下手 => to be bad at doing something N5
…以外(いがい)に…ない => with the exception of; excepting ~ N4
Limit
[切「き」]れない => Can't finish/complete A N3
Potential, Possibility
~をかわきりに(~を皮切りに)      => One after another; starting with ~ N1