Having the kitchen and the bathroom doors face each other is considered very bad feng shui, indeed. One does not need to know much about feng shui to intuitively understand that this is not a good set-up for a healthy home.
When two doors are opposite each other, the feng shui energies flow very fast in and out of the spaces that are guarded by the doors. This is why another direct door alignment - the front door aligned with the back door - is also considered bad feng shui.
What you have in the case of a bathroom door facing the kitchen door is the energies of the bathroom (release, purification, letting go, etc) mingling with the precious energies of the kitchen (nourishment, cooking, warmth, love & support).
In practical terms, you have the undesirable odors from the bathroom affecting the energy of the kitchen, which is the heart of the home. In more complex terms, you also have the energies of the water feng shui element of the bathroom going against the fire feng shui element of the kitchen.
It will be harder to maintain optimum health and loving communication levels in a house with this set-up, but it does not mean you cannot do your best to even slightly improve the situation.
Your goal is to create as much division as possible between the kitchen and the bathroom, and here are 5 simple feng shui tips to consider if you cannot move out or plan a renovation.
1. Always keep the bathroom door closed. This will help keep its energies from spreading into the whole home, and especially into the kitchen.
2. Be sure your bathroom is always clean and a pleasure to be in, meaning it has really good feng shui energy.
3. Find a creative way to define the boundary between the bathroom and the kitchen.
For example, you can experiment with a divider screen, a tall plant or a bamboo curtain (if your kitchen has an open entryway) or have doors with no glass (if the kitchen doors have glass inserts).
4. Choose different wall paint color on the two opposing walls -- the kitchen door wall and the bathroom door wall. This can work well to define and energetically separate the two areas.
5. Creating a focal point in between the two areas will draw the energies away from mingling and bring a sense of beauty. Work with big scale art and choose colors and images according to the feng shui bagua requirements for each specific area.
Once you understand what needs to be done and experiment with various solutions, you might find many more ways to improve your current situation.
If you own a home, look into the possibility of at least a minor renovation to remedy this situation. And, if you rent, you will surely be wise to avoid this set-up again! Understanding what makes a good feng shui floor plan and what is the best placement of all rooms in the house can help you make good decisions in the future.