the concept of an Individual Mandate started with the conservative 'Heritage Foundation", and was later implemented by Mitt Romney in Massachusetts while he was governor...Obama modeled the ACA on that plan, so direct your complaint to Romney, et al.
I recommend that you stop by your local library and take out Steven Brill's "America's Bitter Pill" for an in-depth view of how the ACA came to be...and how it has truly made a very positive difference in many millions of Americans' lives...and why even Mitch McConnell would never abandon Kentucky's version of that law (i.e. "Kynect").
Nancy Pelosi has been a blessing to this country, as well as a great Speaker of the House.
Link: https://www.verywellhealth.com/obamacare-penalty-for-being-uninsured-4132434