(((((((((((((sending massive hugs)))))))))))))))

I am sorry you got fired and that your co-workers are not showing sympathy and are not reaching out. Unfortunately, in many workplaces, it's every man for themselves mentality. I doubt it's personal. I think everyone just does what they need to keep their own jobs and once someone gets fired, it's like out of sight out of mind. Unfortunate, but it does happen. Try not to take it so personally, if you can.

As for the isolation, the job search process can be hard and a lonely task. I am going through it myself! I understand wanting to process your feelings alone. But isolation can tend to lend to greater depression... so perhaps reach out to someone about it so you don't isolate too much?