Another point I find very hard to explain without a designer, is how many complicated ecosystems have come to exist on this planet.
Wikipedia under the heading ecosystem states: Introduction of new elements into an ecosystem tend to have a disruptive effect. In some cases, this can lead to ecological collapse or "trophic cascading" and the death of many species within the ecosystem.
With other words, take away 1 element out of the ecosystem, and the rest might disappear with it.
This automatically brings up the question, how did all the parts of the ecosystem find each other in the 1st place? The explanation in wikipedia is far from giving any answer to this question, it is lacking examples to prove the points favoring evolution, and I have so far never gotten any serious answer to that at all.
More complexity in life and its ecosystems is usually detrimental for the survival and progress of a species, so the chances of just evolving without design are rather small.