If both cofounders bring in equal experience, money and their time, it should be equal.
However, in many cases, one founder (who started the idea and the vision) brings in money on the table. Hires a cofounder (say in tech) who demands some salary (perhaps with a cut).
In those cases if founder is funding the entire startup with his own money thus his share of funds should be treated and compensated with equity, just like an angel.
For Example. Assume your ideation company of value 100K and the founder brings in 10K but other cofounder doesn’t then the founder is entitled for 10% more equity, right?
Thus, in my opinion, Founders start with equal split but mutually decide for 60-40 or whatever depending upon the money/valuation.
Coming to founding team members. They usually get a salary and a single digit (or less) depending upon the experience they bring in.
This is purely based on my past experience, so kindly take it with a grain of salt.
Your resume shows you are a true entrepreneur and produce great results with much less. A far better fit for the startup world. My first suggestion is to make sure you highlight your contribution in each company in your resume. For example mention how your efforts led to X% of growth until the company closed down due to pmf issues / covid/ funding winter / founder breakup/ or scale issues.
People understand, they really do. It’s not a sign of weak resume. Infact it would be a wonderful discussion on your learnings and how you or the company could have done better.
I feel you are burnt out. Take a break from the startup world for a while. Hence, another suggestion is that you go back to corporate for some years and regain your energy. Be a startup mentor in your local university or a local accelerator, if you want to stay connected.