If you have an up-to-date version of Windows 10 or 11, there isn't much of a reason to have an antivirus outside of the default Windows Defender. Most of them do exactly the same things, and the ones that do extra are almost all paid.
Sorry, but i encounter so many systems from people who think that that are infected with malware, keylogers, viruses etc. i just can not disagrea more.
P0r# sites, some less legit software or game sites (where you can easly end up on looking for a solution for a not so common problem) and files someone else sends trough email, or being not to bright with scam mails and still opening the mails (you do not need to download a actual file to get infected, they can just packadge it in a image or any other thing you computer stores into its history.
And the worst ones are where someone buys add on a for example a online market place, and the gif images of the adds (wich wil be stored in your history) contain a malware/virus code.
This actualy happened (a trojan) on a Benelux Only Ebay market place, almost no antivirus detected it, only Bullguard and Norton, and with in a week or so the other could detect it also after a virus definition update, but by that time they migh have already stollen your passwords etc.
So if it is your Antivirus wich is eating up a lot of resources, just disable it wen gaming and see if it actualy causes the problem, if so, just temporary disable it wen gaming.