Perhaps. But tbf the away fans especially were very vocal last season with banners, chants and as cringy as it was the, the plane flying overhead all which attracted a lot of media attention. Only to then have to stop when results picked up and ultimately ignored when Kroenke awarded Wenger another two year contract. You don't see the same level of protests this season not because the level of anti-Wenger sentiment has subsided (quite the opposite really) but more rather because people realise it's ultimately futile after last season. People are just tired and apathetic now.
Short of doing a Blackpool style protest where fans literally invade the pitch and stop a match I'm not sure what else is there left to do.