Your methodology doesn't disqualify anybody who could have started with incredible small lifts and then added higher lifts at the end of 60 days. That would not reflect actual development.
Most importantly, I am aware of how to do steady slate programming, which seems to be what your App is selling. I have access to spreadsheets and the ability to program by percentages, as do most people.
Your app would be 100x better if I simply were able to input my One Rep Maxes and then have it spit out a 3 month plan of 5x5 training starting around 70% of my max increasing my loads by 5% a week, with a deload week every 4-6 weeks. Perhaps adding in weeks with 3x5, and 3x3 as it gets near max. However, as you likely know, no one is going to pay monthly for that.
Instead, you have packaged common knowledge as AI. You have taken data from users (that you charged a monthly subscription) that are not qualified to give educated information, failed to qualify which of them were experts, and are attempting to pass it off as some sort of hive learning. For that you want $8 a month (AND their data, to be used for who knows what in the future) from people who are looking to better themselves.