I doubt anyone is certain of what's being equated with what in your posts, least of all you. You started with "higher" and "better" and moved rather inelegantly to "more complex". The theory of evolution does not argue that later creatures are "better" than earlier creatures, so that's just your own misunderstanding.
I have stated that EVOLUTIONARY charts show increasing complexity as the evolutionary line progresses.
Nor does the theory argue that later creatures must be more complex than earlier creatures - in fact, I gave you one example where a creature from a much older family than yours is measurably more complex than you. Since you brought up the amoeba, A. dubia has the largest genome yet known, 670 billion base pairs. Despite the fact that its origins predate yours, and almost certainly the toad's, it is measurably more "complex" in a very real sense than both you and the toad.
Maybe you saw the chart, but there's a bit more to it than that.