ごらん => (please) try to; (please) look N3
~たらさいご => If you do… negative result N1
Situation, case
頃 (ころ/ごろ) => around; about; when N4
てごらん => Please (try and) A N3
Verb Suffixes
まさか...とはおもわなかった => never thought that N3
Surprised
はさておき => setting aside ~ N2
Trend
〜がさいご(が最後) => if you do... negative result N1
Decisive (resolute decision)
さん => Mr., Mrs., Ms. N5
Respectful, humble
いまごろになって => Only now ... N3
Time
お…くださる => Please do ~ (honorific) N3
Respectful, humble
たが[最後「さいご」] => Once A occurs, B happens N1
Information, Report
させておく => Leave it alone, don't interfere N2
Position, perspective