Ok well there's a lot to unpack here.
Let's examine why you think illegal immigration is evil. Illegal yes, but evil? I could understand saying smuggling fentanyl is evil, and human trafficking is evil. We could examine the number of illegal immigrants in the country here, and the vast majority are from expired visas.
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Secondly, no one is saying that border security is not important or should be "wide open"...what they are saying is that spending billions on a wall thats defeated by a $15 ladder is foolish. If you examine history, border walls have never worked...didnt work for Hadrian, or Qin Shi Huang, and it didnt work for the Soviets. There are other ways to secure a border. The vast majority of major criminal enterprise comes through ports of entry...so trucking and maritime shipping, invest where the big problems are.
As for the 85,000 that ORR/DHS lost track of I cant speak to it. Nor do I know what time period those that sought asylum entered the US. As of July of this year there were 6,127 UAC's in ORR's care. Meaning that of the 410,000 that have been allowed asylum since 2013, it has under its care 1.4% of those kids. After they are placed with sponsors, where does the responsibility lay? I dont know enough about the ORR and their processes to speak on the matter. We should be doing better to make sure these children are given the care they need, however I seriously doubt this issue is limited to the last 3 years.