So in fact you have no evidence for any predecessor to the trilobite.
Incorrect.
We have predecessors much older than trilobites which already were showing a trend from stromatolites to the more complex Ediacaran life forms. The span of time involved makes evolution of trilobites a viable theory.
Nothing.
Denial is not a virtue.
Yes sure you can surmise they existed, but that is on the level of fantasy.
It is at the level of an explanation of the known data. Considering the more complete fossil record of more recent organisms, it is far from fantasy.
Reality is they suddenly appeared fully formed as did MANY phyla at that time,
Actually, that would be all phyla at all times.
... the evidence favors creationism.
Well, if you had a god continually creating new species based very closely on the preceding life forms over four and a half billion years and perhaps you had some kind of a prehistoric genetic laboratory artifact: well, you might have a point.
Let us know how your research goes.