を[余儀「よぎ」]なくされる => Must do A N1
Will, Decision, Doing
…すぎ ... => too much N4
Emphasis on degree
どころのさわぎではない => This is not the time to do things... N2
Base, base
すぎる => too much N4
いささか => a bit N3
Evaluate
かぎり/ないかぎり => While A is the case/still true N2
Conditional, While
かぎりだ => Very A N1
Degree/ Level/Amount
さ => -ness N4
さえ/にさえ/でさえ => Even N3
Not only, Not even
に[限「かぎ」]って/に[限「かぎ」]り => Only A (A is a special condition) N2
(Not)only, (Not) even
さあ => well N3
Suggestion
に過ぎない => no more than; just; merely; only ~ N2