If you believe there is actually no possible way to show some sort of profit in future years, then you might have resign yourself to the fact that the IRS will apply the hobby loss rules to the enterprise.
I recommend that you read the information at the link below, first.
https://turbotax.intuit.com/tax-tips/small-business-taxes/when-the-irs-classifies-your-business-as-a...
Subsequently, I recommend responding to the IRS notice with a statement that addresses each of the relevant factors (link below) in determining whether an activity is engaged in for profit.
https://www.ecfr.gov/cgi-bin/text-idx?SID=2c8c515e70d79f99314ab3dd0c63c6f4&mc=true&node=se26.4.1_118...
