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Peat moss, alone, is very acidic. It also doesn't contain enough nutrients to sustain a plant. This is simply a medium that is meant to provide some hold without being a nutrient rich medium.

This should be replaced into quality potting soil (that will usually have peat as a small portion of the additives) with some compost added. many soils are already enriched with compost.

Keep the soil moist, but let it dry just a little down to about 1/2 an inch. They like it moist, but not wet or dry.

This article will help you with their care: https://www.gardeningknowhow.com/houseplants/anthurium/anthurium-care.htm

Try raising the humidity around the plant by misting or using a pebble tray. Here is more info:

https://www.gardeningknowhow.com/houseplants/anthurium/anthurium-care.htm

https://www.gardeningknowhow.com/houseplants/hpgen/raise-humidity-for-houseplants.htm

It sounds like a lack of light. This can cause stems to elongate, becoming brittle, however your photo did not come through so I can't confirm this.

Sometimes, this can happen with overwatering, as well.

This article will help you to care for them properly: https://www.gardeningknowhow.com/houseplants/anthurium/anthurium-care.htm

The anthurium has both male and female structures on the plant. Some plants have only male or female, not both. It's important for purposes of breeding new cultivars. If you want to increase your plants, it's best to divide them when they become rootbound.

Here is information on their care and breeding:
https://www.gardeningknowhow.com/houseplants/anthurium/anthurium-care.htm
https://www.gardeningknowhow.com/houseplants/anthurium/anthurium-plant-division.htm
https://edis.ifas.ufl.edu/ep366#FIGURE%204

There are a few things that can cause what you see here!

Too much light will be the first thing to consider. They do not tolerate direct light. This must be bright, but indirect.

Cool temperatures could, also, be to blame. They are only hardy to zone 10, making them only suitable for tropical environments.

The next thing to consider will be overwatering. Though they don't like to dry out, completely, they do like a little break from the wet soil. Only water when the top inch of soil is bone dry.

Last will be nitrogen burn. Feeding with a high nitrogen fertilizer will cause burning to the leaves. It is best to use a cactus mix, with compost mixed in. This will provide adequate drainage, as well as nutrients that will not burn the plant.

Here is an article that will help you to care for these properly: https://www.gardeningknowhow.com/houseplants/anthurium/anthurium-care.htm

There are a couple of things that could be happening here. Disease from overwatering is one possibility. The other possibility is a high nitrogen fertilizer. This will burn leaf tips and prevent flowers from forming properly. Both issues can have the same symptoms, but they will show in slightly different fashions.

https://www.gardeningknowhow.com/houseplants/anthurium/anthurium-watering-instructions.htm