The variety they sell for cover crop is probably not the one most would choose for eating fresh.
Eating vs cover crop
" Seed companies, including Oregon’s Territorial Seed Company, sell small-seeded favas for planting as a cover crop. Varieties are sold as Banner and “small fave cover crop,” among other names.
Small-seeded favas protect soil from months of pummeling rains. They are hardy to about 10 degrees. They fix nitrogen from the air into the soil and can provide as much nitrogen for your next crop as fertilizer, equivalent to 100 to 150 pounds of nitrogen per acre.
Culinary varieties of fava beans are much larger seeds than cover-crop types. Up to an inch in diameter, the seeds/beans can be eaten when young, green and tender, and they taste like buttery lima beans. They fix nitrogen in similar amounts to small-seeded favas."
Fava bean varieties
If you try again, I read about freezing them briefly, then peeling which makes the process easier.
“The Easiest Way to Peel Fava Beans”