Yup. For bootstrapped product firms, the founders really have to expect 2-3 years at the minimum before even thinking about paying themselves half of the baseline salaries( SF or NYC ) that they were getting during their employment years. Have personally seen so many of my peers getting burned out both professionally and personally with unrealistic expectations and quitting the software industry completely.
Tech people tend to underestimate costs associated with running a business. Hosting, marketing, sales, salaries, rent. 1k MRR is a great milestone but yes it really is $0 in salary for founders.