Completely normal to be bitter. You were doing your job and had your life in order, then your company disrupted all that by laying you off.
But that’s the past and now you need to put on a positive face and work smart and hard to find another job. Don’t let your bitterness cloud your attitude. You’ve got to show the best you to potential employers, not the disgruntled you.
Word of mouth is often a good way to find positions, ask friends and acquaintances if they know of any positions.
Universities need a lot of staff and tend to be more stable than businesses. Also I’ve heard many times that working for temp agencies often leads to permanent jobs when the temp job is over.