The report showed that 27 percent of Gen Z members reported that their mental health was poor, compared with 15 percent of Millennials (Generation Y), 13 percent of Gen Xers and 7 percent of Baby Boomers. AdvertisementAdvertisementThe Biggest Issues for Gen ZSo what most stresses out Gen Z? In fact, 75 percent of Gen Z respondents said that mass shootings are a significant source of stress, compared with 62 percent of adults overall. For instance, among Gen Z social media is noted as a source of support, yet 45 percent say it makes them feel judged. Now That's Important The report took note of the special stresses some Gen Z members of color face.