YOU SAID:

The boy was through going through all of this nonsense

INTO JAPANESE

少年はこのナンセンスをすべて通り抜けていた

BACK INTO ENGLISH

The boy had gone through all this nonsense

INTO JAPANESE

少年はこのナンセンスをすべて経験していた

BACK INTO ENGLISH

The boy was experiencing all this nonsense

INTO JAPANESE

少年はこのすべてのナンセンスを経験していました

BACK INTO ENGLISH

The boy was experiencing all this nonsense