Testing for 1.4.5 occurred over an unprecedented three weeks, with each week met by unanimous negative feedback about two topics in particular: mobula gun arcs and the changes to loch. After the feedback, the mob nerf was increased and loch was made more unbalanced. The release of 1.4.5 showed a complete disregard of player feedback and lack of game knowledge
To be clear, there's an important difference between a bad change and a broken change. Remember the contentious pyra nerf? Truth was, the pyra needed a nerf in pub matches. The forthcoming change was too harsh and took way too long to be addressed, but there was at least a modicum of thought behind it. The mobula gun arc nerf was asinine and broken. It had no effect on the meta, hades art/banshee, and only hurt non-meta builds and pub players whose 50 degree bottom guns no longer worked. Similarly, loch was changed so that it deals higher dps than greased on some guns, and is useless on all heavy weapons - where it was previously vital
Muse was well aware of all these facts as they were flooded with feedback from the three weeks of testing the same failed changes. There were plenty of good alternatives offered for the mob and loch, but week after week nothing changed. I'm unaware of any other patch that took three weeks of testing, or was so overwhelmingly negative