A couple problems - your clinical hours and ECs were pretty average during both cycles which hurts applicants like you who have average/slightly above average stats. You have to stand out from the pack of applicants where majority of applicants have your similar stats (even though your second MCAT is by far stellar, this still doesn't make you stand out when ECs are average). Additionally, your list is
way too top-heavy. It would've been fine to add a handful of them, but your list does not reflect your overall candidacy with the GPA (and downward trend last semester).
Regarding your clinical hours through scribing now, that's fantastic that you have that and should boost you in a 3rd cycle. It didn't matter at all in the 2nd cycle and you wasted writing space by trying to include anything about it - adcoms don't bat a single eyelash at prospective hours - they don't count and are assumed to potentially never happen as people drop prospective experiences all the time for a variety of reasons. So you essentially applied the 2nd round with no increase in EC experiences (which was a weakness) and a dramatically improved MCAT (which certainly could've helped, but a lot of schools average MCAT scores, so not always considered the 'easy fix' button to press, also considering your first MCAT wasn't necessarily a huge problem).
For a third cycle, I would suggest diversifying your school list, with the core percentage (60-70%) being made up of more middle-tier schools. I think with the MCAT, you have a shot at T20s, so it is fine to include some of those as well, but your list should not remain this top heavy. Also practice your interview skills as those potentially could've been an issue with neither of the 2 IIs becoming As. Lastly, you should continue to apply broadly as you did the 2nd cycle (~30 schools). Forget DO, your GPA/MCAT are too high.
I think your PS sounds fine with the right structure, I would simply beef up what you have with your updated experiences from scribing/food pantry and call it a day. Continue to apply very early (before July) and use secondaries (where applicable) to write a thoughtful, provoking narrative on the resilience you've gained from being a third-time reapplicant and life lessons you've garnered from these experiences. Stay away from excuses or highlighting negative aspects of your application and make the "reapplication discussion" about how this has been an important shaping experience + underlined the passion that you have for medicine. I think you have a decent cycle ahead of you if you make these adjustments.
You could ask
@Faha @Goro for school suggestions.