Hi Ralph & Welcome,

Anthuriums do well in indirect-bright-light. Not exactly shade.
However, as you stated, you placed your Anthuriums outdoors, under a canopy.

Unless the canapy surrounded light entirely, outdoor shade is equivalent to very bright light indoors. Even a semi-sunny window.

Which direction are they facing?

What about nursery conditions? Light/Temps?

Brown leaf tips are caused by under-watering, direct sun, dry air, tap water, over-ferrtilizing and then some.

As for holes in leaves. Did you notice holes when purchased?

When plants are outside, one of numerous insects bite foliage.
Even grasshoppers. :)

Are the holes tiny? Round, or look torn?

Do you have photos of your Anthuriums? Toni

The holes in the leaves are probably from snails, which relish Anthuriums.
It also sounds like you may be over watering. This too will attract snails and cause the roots to rot. Try putting them under a tree in a forest floor setting, c shade/very filtered sun and high humidity. Water once a week and fertilize once every three or four waterings.

There are many different species of Anthurium, do you know which ones you have? Some are epiphytes so don't do so well in just soil, unless there's a thick layer of organic matter on top.Some photos would help work out what the problem might be.