[Need Encouragement & Advice] Just got rejected after three round interviews for an Internship position

I am not sure what I need to do anymore honestly. I have been rejected from many companies and after interviews with 9 different companies for this Summer internship, although I have two co-ops experience under my belt. Not totally sure if this pandemic makes everything worse. Should I start applying full-time role since I only have one class left after this Spring semester? My concern is only because I have not graduated yet. Feel free to give me encouragement and advice.

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