Regarding viruses, please read the 6th post in this thread on another forum:
Orchid virus?
Regarding the color pattern in the blooms, there are many Phals that are bred to have color patterns like what you are seeing. Did the blooms look like this when you bought the plant?
Regarding keeping or not keeping the plant, that's totally up to you. Remember, this is a plant, not a dog or cat. Its a mass-raised Phal hybrid. If you don't like it, give it away, or toss it (much like you would a head of cabbage you did not care for).