SSPLv1 is not a free software license. It is constructed to have unsatisfiable obligations that, in practice, restrict how the program can be used for completely legitimate, legal, and ethical purposes. Because the obligations cannot be satisfied, the license restricts the freedom of the user, thus software licensed with SSPLv1 is not Free Software.
See also the blog post from Bradley M. Kuhn, one of the main Free Software organizers who led the work to draft the Affero GPL and AGPLv3 licenses. [1]
Additional disclosure: I (personally) am a Software Freedom Conservancy Sustainer [2]. Consider donating if believe in fighting for digital rights, including rights to repair and improve software.
[1] https://sfconservancy.org/blog/2020/jan/06/copyleft-equality...