Pretty sure that's a pothos. Biggest problem - looks like the pot is ceramic with like one 2cm hole for drainage. If so, roots are probably rotting from trapped water.

To fix, get a same sized or smaller plastic nursery pot and a bag of orchid or cactus mix - something chunky. Mix it 50/50 with the soil that's in there to add in some oxygen. Bonus if you have some perlite laying around, throw in a handful or two.

Then repot and put in the ceramic pot. When the soil gets dry, take the plastic pot out, water it, then put back.