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If that's how you perceive the quick battle bug, then you either don't understand something or you're exaggerating for some reason. The bug has quite strong limitations in its application, it's practically useless against ranged units or magic. In my tests in the Lime maps, the bug was useful in about 5 battles (out of about a hundred on the map). But again, it's not free: it sacrifices its own units, not just any units, and the number of which can be limited by the map author, it is useful only for ranged units and harpies, and as a rule, a cart of ammunition is needed, the possible presence of which is also determined by the author.
For comparison, I remember another bug - the berserker on two-hex units. The bug also has limitations in its application, it also practically gives a free win in some conditions and also ignores the number of units in the enemy stack. It was also fixed in HD or HD+. I remember that on one of the puzzle maps, it was necessary to use it, and in the chat, Dirty_Player wrote that he used it against Hellight in the final. And I personally don't understand why using the quick battle bug is so bad, while using a similar bug/method of similar power is somehow okay, even though in that case, another person suffered.
PS Regarding other experiments, including the Admiral's hat, there is also something to say, but there is a lot to write about. If you insist, we can discuss this topic as well.
We, the methodists, have long covered everything. And someone is still being shamed for using the Admiral's hat, haha.
I also find real-time speedruns in Heroes very amusing. There are even videos where a complete newbie clicks in Heroes like in Starcraft, trying to show some kind of micro, although he can't even conduct battles properly, but he still wrote two letters WR :D
P.S.: I understand that I have a different view on this issue than most of those present here, but that's just the way it is, so please don't take it personally.
Added 1 minute ago
The topic has come to life))) Here is a specific plus from bugs))))