I personally wasn't expecting TLK to be a masterpiece or amazing, but I still will admit to fondly remembering the hype train, and at least expecting it to be good by Michael Bay's standards. It... wasn't, but I was still able to enjoy it for the mess it was, and the handful of interesting ideas and good moments that were mostly lost in the shuffle. So for me it's at least better than Age Of Extinction, which I just found fairly boring and at times irritating.
(But I am so very glad for the shift in direction Bumblebee will hopefully have wrought. XD)