I'm just asking how I can solve my low DO issues...
Can you tell me how? What's the solution?
I can, but you are not worth the time so the short answer is NO, not today. Do you understand NO?
The answer is NO because I believe you are really to "simple minded" to understand this and clearly you have no intentions of making any effort to learn anything about this. You will never understand the complexity of anything like this nor how to fix it.
My guess is that you probably contracted a serious genetic problem that you acquired at conception. That's 100% your Mama's fault that you are so simple minded. Your genetic dysfunction is not your fault, you were born dysfunctional and that is not fixable even with 21st century medicine and therapies. It like being born with AID's, it's your Mama's fault.
I would bet you are middle age, a Jr. High drop-out at best, an introverted isolationist and antisocial. A real mess in the general population.
This is my personal opinion and evaluation of you. No disrespect intended, but you are what you are which is crystal clear to me.