She's been like this for two months now so I assume is still alive just needs some TLC from someone who knows what they are doing. Unfortunately, I don't. Which is why I am here.

I assume the issue is root rot and I should repot and remove the diseased roots?

Also read online to not use a regular pitting soil but they favor an aroid mix. Will that help?

TIA for the advice!

The spoiled foliage doesn't necessarily indicate a fungal infection of the roots, but it's a good indication SOMETHING is happening in the soil that is beyond the limits of what the plant is programmed to tolerate. top contenders would be over-watering, soil compaction and the lack of oxygen that comes with it, or a build-up of dissolved solids (salts) in the soil - which makes water uptake and movement to the plants most distal parts difficult. Since the most distal parts are leaf tips and margins, they usually bear the symptoms.

You/we can probably figure it out by answering these questions:
* When you water, do you water copiously enough that the entire soil mass is saturated and at least 20% (approximately) of the total volume of water used exits the drain hole?
* Do you allow water that collects in the collection saucer to be reabsorbed by the plant?
* Does your home have an ionic exchange water softening system (uses salt as the exchange medium)?
* How do you determine when it's time to water?

Al

I think I am looking at an Anthurium? An Anthurium andreanum?
While sold as terrestrials, many anthuriums are epiphytic. Andreanums can be grown either way. But they do have epiphytic tendencies.
Your pot looks too big. And it also looks like it has one of those fused saucers on the bottom. These pots don't generally really drain all that well, the holes in the bottom tend to be small and tend to allow moisture to stay longer than it should in the lower levels of the soil mix.
If anything, to me, to looks too dry though. You could check what is going on by just pulling it out of the pot. Ifs its the Black Lagoon at the bottom around the roots, then there you have it...if the soil is dry and crumbly, that is just as bad.
If this were my plant, I would ditch that pot and get an appropriate size plain ugly nursery pot, and repot it into a mix made from regular potting mix as a start with added perlite and some fir bark (orchid bark) pieces to lighten up the soil. You can also add pumice, rice hulls, whatever you have that will serve the same purpose Even left over styrofoam packing peanuts. You want it to be light and well draining so that you can water this maybe once or twice a week depending on your heat/humidity etc by SATURATING ALL THE SOIL and eating the excess drain out of the bottom holes until it stops draining. Sporadic under watering for fear of overwatering does as much damage as literal overwatering. You can always set the ugly pot into a nice cache pot.
Anthurium roots like objects in their soil for the roots to adhere to and grow through and around. Eventually in an older Andreanum, the roots will become visible on the top of the soil and the plant will start to offset, in a stacked manner. It's ok for these roots to come out of the soil, just water them like usual.
If you have the ability, you should summer this plant outside in the heat and humidity, in a protected shadier location. You can pull it in in the winter to a sunny windowsill.
These andreanums grow in the ground, but the soil here is just sand. So it drains like a colander, and allows them to be watered almost daily.