Not only does the trope not seem particularly intended to be YMMV, but it also seems to be used on this page in the sense of "the previous boss was harder", which I don't think fits the trope in any way. Grounds to remove the trope specifically and merge the example text into Anticlimax boss above it? I ask specifically because, just going off the vague descriptions used on the page, it's not clear if the previous harder boss actually transforms into this anticlimactic one.