~をかわきりに(~を皮切りに)      => One after another; starting with ~ N1
~ばよかった/~たらよかった/~ばよかったのに/~たらよかったのに => If only N3
…とばかりおもっていた => Thought that ... N3
Speculation
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
~ぶんには(~分には) => as long as ~ N1
ではなかったか => Wasn't it ...? N4
Exclamatory
ではなかったか => Wasn't it? N4
Speculation
かりに…たら/…ば => If..., suppose... N3
Condition (hypothetical condition)
んじゃなかったか => shouldn't have... N4
Regret
…のではなかったか => Wasn't it…? N2
Doubt
てよかった => I’m glad that ~ N4