From a publicity standpoint, it’s been an awful training camp for Dallas Cowboys defensive back Trevon Diggs. Diggs has been getting torched by several no-name receivers in training camp so far, and those videos are being made public. Diggs is sick and tired of hearing the criticism, especially during training camp. The Dallas Cowboys star has reportedly deleted his Twitter account to focus on his mental health and get away from seeing all the criticism. “Trevon Diggs deleted his Twitter. Honestly, good for him. Get rid of those negative thoughts. One thing cowboys players have to learn is that they…