One frequent complaint I see is the difficulty accessing therapists either owing to cost or availability. Also just feeling lost as to how to attack the problem.
I see it as an information issue. According to research, online-administered CBT can be effective, and so are workbooks. Since CBT is so simple in principle, no reason this information shouldn't be easily accessible. I've even found free CBT workbooks online: https://depts.washington.edu/dbpeds/therapists_guide_to_brie....
This doesn't have to "replace" therapy, but it can be the first line of defense, along with what we know helps a great deal: regular exercise (boosts serotonin and reduces stress), adequate vitamin D3 intake (mood enhancer and helps anchor circadian rhythm), proper whole foods diet, enough socializing, etc.
I think the (possible) epidemic of mental health issues is exacerbated by a combination of isolation, stress (and negative newscycle bombardment), sedentary lifestyle.