he's somehow built a better defence.
What is your point exactly?
Dortmund's problems are largely temporary and influenced by factors out of Klopp's control.
Wenger's problems are largely of his making and his stubborn insistence on persisting with a style that has been found out by all his rivals and wilfully refusing to strengthen key areas of the team.
Surely with an Awimb handle like 'the splendor of antigone' you'd recognise the idea of tragedy being at the heart of human experience and the irony of Wenger's own personal personal little tragedy being repeated week-in, week-out as repeats the same mistakes endlessly in the vain hope of a different outcome.
Klopp's current problems are passing ones and largely out of his control. Wenger's problems are of his own making and apparently permanent.