I max out my contributions to progressives, similar PACs, and canvass door to door at every election I can for those who champion for these public goods (healthcare, education) to be universal. I'm doing my part to sway anyone I can from putting themselves through a grinder for services they should be entitled to without military service. Yes, the world sucks current state, and yes, I agree whole heartedly that complaining is not enough.
[1] https://stopsoldiersuicide.org/vet-stats ("Veterans are at 50% higher risk of suicide than their peers who have not served." ; "Depending on branch, up to 31% of service members develop PTSD after returning from combat." ; "The rate of suicide for veterans in the LGBTQ+ community is up to 7x higher than for non-LGBTQ+ veterans." ; "More than 40% of female veterans report experiencing military sexual harassment or military sexual trauma.")
[2] https://www.nytimes.com/2021/06/22/us/911-suicide-rate-veter... ("Suicides among post-9/11 veterans are four times as high as combat deaths, a new study finds.")