I kind of had the same reaction from the other side, sort of.
If this was any other universe, I would have felt that the show was too dark and depressing at times. But what kept it from feeling that way to me was the fact that it was a Star Trek show. Just knowing that what is to come in Star Trek is bright and hopeful and rainbows and ponies really helped me overcome the thought that the show was a little depressing. So it being a Star Trek show is what gave it that needed balance for me.