In spite of the rumours, Autoptimize is not a magical all-in-one pagespeed insights checker @yellowgreenmedia; it “just” does CSS/ JS optimization and can “fix” most of the warnings GSPI issues regarding render-blocking CSS/JS & JS/CSS minification (some config might be needed, cfr. FAQ). But optimizing images; no. Optimizing server response time; no. Optimizing external resources (fonts/ JS/ CSS from Google, Facebook, …); no.
So it seems your one-star-review is entirely based on wrong assumptions ??
But I’ll be happy to review your AO config & your GPSI warnings with you, if you’d like to pursue.