Plenty of veterans don't kill themselves.
If we considered it the other way (that allowing someone to join the military or any difficult job is tantamount to cyber bullying) then imagine all the blame you'd have to spread around should a recruit or veteran kill themselves.
Then think about the possibility that the suicide many have been for reasons no different than they would have encountered, even if they had never joined at all.
Otherwise we'd literally be in a nanny state, and where does that stop? Should we prevent people from joining the police? How about firefighting? How about firefighting for wildfires? Or roofing?
Either way you can blame people until you're blue in the face and it won't help the veterans. The action that would be of help is to treat those who are wounded, and to prevent the politicians' use of the military in unneeded/unjust conflicts in the future.
People undergo felony charges all the time without killing themselves.
A Federal charge sheet involving the possibility of a 'mere' 6-month sentence is not the equivalent of months of sustained cyberbullying.
To continue with your analogy somewhat, if a new sailor showed up to the boat and his divison said 'Hey look, it's the F.N.G.' on day 1, with no further hazing from there, and that new sailor hung himself, is his division to blame for 'cyberbullying'? Or is it appropriate to wonder whether the new sailor has something more going on inside that pre-dated his arrival?