"Here's where evolutionary theory fails" is always followed by "I dont understand anything about it" but with way more words.
Here is why The Theory of Evolution fails.
At some point in the evolutionary past, organs like livers, brains, eyes, etc did not exist. They had to "evolve" into existence.
The origin of these novel organs would require brand new, never before seen genetic sequences (DNA segments) to code for novel proteins, which would need to be engineered into novel biological machines, which are then combined with other machines to facilitate system-wide function.
This also requires MORE genetic sequences to help with regulation, development, placement, guidance, timing, etc.
Are you starting to see the problems? It's not just one change at a time adding up over eons. It's a whole coordinated host of changes that must take place.
But this simply does not happen.
Evolutionary mechanisms do not construct novel coordinated systems.
Many experiments have tried to produce or observe organisms creating novel biological structures through evolutionary mechanisms, and they all fail. Every single one.
Either they observe pre-existing parts being reused or optimized for some task, or they see mutations destroying or removing things.
What we don't see is any progress towards novel systems. No novel proteins, no novel cell types, no novel genetic sequences...nothing that evolutionary theory requires.
Unless evolutionists can present that data, the theory fundamentally fails.
Evolution optimizes what exists; it doesn't construct new things.
Only intelligence invents novel functional coordinated systems.