There are differing opinions regarding paid versus free anti-virus. Everyone has their own thoughts - and there is little agreement.
A lot of it depends upon what a person thinks is the best protection model: signature-based, system lock down, etc.
It also depends upon what features people think are important; some have more features than others.
Personally, I think a lifetime license for Sandboxie, lifetime license for Shadow Defender, or an annual subscription to AppGuard are worth the money.
As far as antivirus, I think it is not worth the cost - because Windows Defender, Windows Firewall and Windows Smart Screen on W10 do a very good job. Plus, Comodo Internet Security can be had for zero cost.
You won't necessarily get better overall security by paying for an internet security suite. What you are actually paying for is support.
If you need good support, then I would recommend Emsisoft Internet Security (support.emsisoft.com).
With some time and effort to developing your IT security knowledge, you can craft a freeware security config that is every bit as strong as or stronger than what many paid security softs provide.