Worst thing about it
Aside from the melodramatic score, and problems with character development and bad dialogue acting, the biggest problem for me, that made it go from, possibly, "bad, but entertaining in parts" to "laughably bad" was the dystopia itself. Australia must really be, as a BBC article put it, "Sweden with sunshine" (i.e. very law-abiding) if Australians think this is what the breakdown of law and order would actually look like. Now, I have actual experience of living in places where the rule of law is feeble and I found the Mad Max dystopia frankly ridiculous. For example:
-Seemingly, everyone has guns... except the outlaws (most of them, most of the time, at any rate), so that an old lady with a shotgun, instead of being killed on sight, can boss them around.
-Roads are in mint condition, even ones that are supposed to be off-limits and, of course, the powers that be trust that people will obey a sign instead of actually physically blocking access.
-Max and his family travel as if they were taking a holiday in Switzerland.
-Nobody, it seems, makes the least effort to surround property with a masonry wall or at least barbed wire, or has dogs, or anything that will at least warn of intruders or delay them, even in the absence of neighbours, and the woods are considered a perfectly safe place to wonder off alone and unarmed.
-The near-breakdown of law and order seems to have no economic effects whatsoever - Max, who is an honest cop (no income from bribes or extorsion or, for that matter, hit jobs) and isn't police chief or anything, has a nice, spacious house, even though his wife doesn't seem to have job or any source of income, and they have a kid. There's no sign of economic worries, and not just in the case of Max. You don't see kids lying on their bare backs on shards of glass to beg for money (which, yes, I've actually seen in the real world) or anything.