What do you think is the best antivirus software?
CAVEAT: This is just my personal opinion. YMMV.
At work I rely on CrowdStrike Falcon.
At home I use paid MalwareBytes. On Windows I also enable Defender.
They aren't for everyone; they're not cheap and they require some work and awareness. But they're very good, and largely non-obtrusive.
In my experience, all the big commercial packages (McAfee, etc.) are intrusive crap and not worth the price.
“the best antivirus software”
If you want secure and trustworthy antivirus software your best bet is to time travel out of this century....