HUGE Recommendation Dilemma

Depending on my next GMAT score, I will apply to several schools, none of which are usually ranked in the top 15. My biggest dilemma is that I work in a small department (under 50 employees) & have only 1 person to use for my rec. letter (my boss, who will give me an excellent recommendation). It has been my only full-time job for 4 years so I don't have any other recommender except my college employer who I still keep in touch with. The other problem is that the place that I work at currently is a VERY hostile place to work & so people always have problems with other employees (which means I have had problems with other employees as well). In UNC's required essay, it states this:

At then end of year one, UNC MBA teammates evalute each other using a formal assessment instrument. Some of the specific areas covered in evaluations are:
Leadership
Reliability, Dependability
Flexibility
On-time delivery
Cooperation
Openness to others' ideas
Quality of work delivered
Communication ability
Willingness to step out of one's area of expertise
Contribution to team's success
Please select two people that have worked with you as part of a team. The two people can be from two different teams. Ask each of them to provide you with an honest and detailed assessment of you as a teammate, especially of your performance in the areas mentioned above.
In 1000 words or less, please share your personal reflections on the feedback you received. How will you benefit from what you have learned? How will your UNC MBA teammates benefit?

How in the world can I answer this question if I don't get along with certain people on my team (vice-versa)? Unfortunately, these essays assume you work at a good place with good employees, but with our turnover rate over the past year, it's really tough for me to write great essays. My college employer was an excellent place to work, and I would have no problem with a recommendation letter from my boss there.