Of course not! If you are feeling frustrated and feel like there is nothing out there that is quite as comprehensive as your current course textbook, be sure to get in contact with your OER librarian or reach out to other CA community college faculty members in your discipline. It is also helpful to join the CCCOER listserv or search the archives of that listserv.
Remember that you are not alone and there are many other instructors looking for the same or similar OER as you! Another option is to compile various open resources links instead of using a traditional textbook format. And, if you are very motivated, you can write your own open textbook and share it! What's nice about Creative Commons licenses, is that you can use bits and pieces of other OER and add your own content, as well.