Yes, some comments in the jam are a bit insensitive. I believe they will learn soon as feedback in all non-local jams tends be encouraging and positive.
Game jams are a way to learn, have fun and collaborate. Taking jt too seriously goes against the spirit of game jams, participants shouldn't become negative nancies, there is always a lot of positive to focus on.
Good luck in your learning and game dev journey and I wish good health to your team mate.