In general, they are not common. The navy invests a lot in training facilities and personnel training to make sure the basic training goes smoothly. But, due to the large number of trainees, there could be some individual cases that seem like horror stories. For instance, a trainee might be more sensitive to the strict discipline and feel it's a horror, while for others it's just normal military discipline. So it depends on different perspectives as well.
I'd say they are not common. Most of the time, navy basic training is a structured and positive experience. The instructors are trained to handle trainees properly. But of course, every now and then, you might hear a horror story. Maybe it's because someone had a different perception of the normal training intensity. For example, what one trainee might find as 'horror' like the early morning drills, another might see as just part of the routine.
Chapter 100, "Ominous, there might be a bloody disaster!", is the clearest early answer because it turns Animal World's situation into a concrete plot event. The chapter gives readers a real answer by opening on The barrage was about to die of laughter.
Chapter 348, "Schemes and Counter-Schemes, the Five of East Ridge, Zhu Yang's Threat, and the Dust Settles", is the clearest early answer because it turns Zhu Tong's situation into a concrete plot event. Early on, Leader Zhu, what a clever move!" Lu Yang seemed to finally come to.... By the end, Five days ago, Dean Gu was transferred to the Bai Mu District..
Chapter 341, "Whose Child Is Jiang Cheng Really?", is the clearest early answer because it turns Miss Jiang's situation into a concrete plot event. It opens with Wei Dong glanced at his wife who had followed closely behind and...
Chapter 37, "Major Changes in Xia City, the Wealthiest Person in Great Xia (Part 2)", is the clearest early answer because it pushes Hong Yu into a new phase or setting. It opens with Excluding the overlapping positions, the total is 153. and closes on Recent changes in Xia City are more than just this city wall." He....
Chapter 346, "Elite Warriors, One vs Three, Reason Behind the Beast Tide [10,000-Word Chapter, Continued Tomorrow]", is the clearest early answer because the buildup finally cashes out in a real clash. The setup is Kill them!" As Xia Chuan's voice echoed, the six thousand soldiers of..., but the pressure keeps building through On the battlefield, roaring is naturally to boost one's own morale,....
Chapter 227, "There's Something Wrong with This Stepmother", is the clearest early answer because it turns Yin Stars's situation into a concrete plot event.
Chapter 332, "Chen Ying's New Discovery, Xia Yuning, Good News Abounds", is the clearest early answer because it turns Xia Hong's situation into a concrete plot event. The setup is Li Xuanling was about to speak when Xia Hong's voice suddenly came..., but the pressure keeps building through It really is like having one's wishes fulfilled..
Chapter 350, "Methods to Improve the Peak of Cold Resistance, Moao's 10th Town, Beishuo Yang Fa, Nightmare, Lu Yun of East Ridge", is the clearest early answer because it turns Xia Hong's situation into a concrete plot event. The chapter gives readers a real answer by opening on Hmph, the Nine Towns have had an agreement long ago: if a Xianyang... and ending on Evidently, the other party didn't believe his self-introduction just....
Chapter 325, "Mobilizing the Beehive, Where Is the Divine Arm Bow? Full Deployment", is the clearest early answer because it turns Cold Resistance Level's situation into a concrete plot event. Early on, Second Year of Great Xia, December 29 As night fell, the underground.... By the end, Of course, there's also the two tribes of Frost Wolf and Snow Mane,....