better to just get the pain over with, rather than prolong the agony
Definitions (粵典–words.hk)
語句
與其因為怕面對問題而一直畀佢困擾落去,不如決斷啲快啲了斷 it's better to endure pain in the short-term than to suffer long-term; to act decisively to end a problem; literally: long-term pain is worse than short-term pain
Definitions (Wiktionary)
proverb
It is better to suffer short-term pain so that one will not have to suffer long-term pain; it is better to just get it over with, rather than prolong the agony.