This defendant was convicted of possessing CSAM. Before that fact causes you to lose sympathy for the case, note that almost every significant criminal case affirming constitutional rights involves a defendant who did something unsavory, if not reprehensible.

Miranda was a kidnapper and rapist. Danny Escobedo (right to an attorney during interrogation) murdered his brother-in-law. Clarence Earl Gideon (right to a court-appointed attorney) was a career criminal. It's the same with freedom of speech cases: they often involve jerks and assholes; otherwise, they probably wouldn't have gotten arrested in the first place.

You can root for the right outcome without rooting for the defendant.

Bad facts make for bad law