Object/Subject use of QUE

Question

I recently saw the expression "Tant bien que mal"In the context of usage of Que/Qui, what decides the use of 'que' here rather than 'qui' ?Thank you

Accepted Answer

Paul, 
this is a fixed expression and they are often/usually better just accepted as is, rather than trying to break them down. 
However in this case, ‘que’ is a conjunction, not a relative pronoun. 
 Attached, with the 3rd link being on conjunctions from Kwiziq
 https://www.wordreference.com/fren/tant%20bien%20que%20mal
 https://www.wordreference.com/fren/que
 https://www.wordreference.com/fren/qui
 https://progress.lawlessfrench.com/revision/glossary/conjunction-types/subordinating-conjunction