Sorry you are having such a rough go of it
@flowerpower123. Two years worth of bad news can really bring you down.
I may be somewhat off base here, but I've been trying to read between the lines on some of your posts. First thing that many people have responded to is how the information in your life story has somewhat trickled out. Perhaps your own story in your personal statement lacks similar cohesiveness. It's also been pointed out that you had several years of not really doing anything. Maybe there was something in that time--an activity, an event, etc--that influenced the makeup of your persona so that it doesn't sound like you spent so much time doing nothing. We all have a fascinating story to tell, maybe you're just not telling yours in a compelling way? For example, you said you "wasted" a year travelling. I have spent a lot of time abroad and gleaned much from it, maybe you just need to adjust your own personal focus.
The second thing that I sort of suspect is that you might have come off as desperate or otherwise displeasing on interview day. I someone at an interview who had stats that blew mine out of the water and this person (a complete stranger) told me about how they had received fewer interviews than they expected and either rejections or wait lists after the interview. Every time I spoke with this person throughout the day it seemed that they were not approaching this process with the poise and positivism required. I know SDN is a safe space and being desperate/upset is OK here, but if you had even a hint of how (rightfully) concerned you are on interview day it might have been a turnoff.
Finally, the way you have addressed your activities in the past year--research assistant, so many hours hospital volunteer here and there--come off just a tad box-checkish. You don't come off as passionate for medicine other than you say you think you would be a good doctor. I said the same thing when I first started toward med school and basically got yelled at for 1. Presuming to be able to evaluate myself as such ("that's the job of an admission's committee, not you!") and 2. telling not showing.
TLDR version
Develop a cohesive, interesting story. Your application is the dust jacket on the book that is you. Make them want to read it (interview you).
Work on your interview skills/attitude, you may think you're fine but accidentally broadcasting something else with body language/offhand remarks
Plus same as what everyone else said: Apply more broadly, and have smart but vicious people rip your application to shreds before you apply.
Also, you've been asked but I didn't notice an answer--what was your turnaround time on secondaries? Pre-write those and get them brutally edited too.
Good luck. Third time could be the charm!