You live in a house which is separate from the other homes. Ask a strata lawyer whether they could draft a by-law “conferring rights or privileges over common property” to have more autonomy over the maintenance of your lot.
Regarding a “divorce”, I suggest you read:
Strata Schemes Management Act 2015 (NSW)
Part 7 By-Laws for Strata Schemes
Division 3 By-Laws conferring rights or privileges over common property
Sections 142-145
For the time being, you are entitled to get common property maintenance work done on your lot. It is up to the owners corporation to find the funds for it.