The entire gaming community loves Doom Eternal.

... I am sorry to inform you that Doom Eternal has a kernel mode anti-cheat.

Yes, the latest game to milkshake with anti-cheat is Doom Eternal. The game's first patch rolled out a new product, Denuvo Anti-Cheat, by the developers of the (in)famous Denuvo Anti-Tamper. Player response has been swift and furious: Doom Eternal has had just over 4,000 negative reviews on Steam since its release in late March, compared to around 3,700 since the patch, and the number of negatives is growing by the minute.

While it is definitely a review bombing in the most literal sense, it is not clear at this time that there is a coordinated campaign behind this effort; since the addition of the Denuvo Anti-Tamper to Doom Eternal, forums like Reddit and negative reviews on Steam have reported slow player performance and unplayability; Irdeto, the makers of Denuvo Anti-Cheat, have stated that the software is GDPR compliant and does not collect any personally identifiable information.

These negative reviews are likely an outgrowth of similar complaints surrounding the Vanguard Anti-Cheat, which Riot Games introduced in the beta version of its shooter Valorant. The gaming community has recently become increasingly vocal against the use of kernel-mode software as an anti-cheat; players of Valorant have reported problems with the anti-cheat as well, including interference with the software's ability to keep system temperatures regular.

For a more detailed explanation of what kernel mode anti-cheat is, why it is important, and why people are really upset, see Valorant's explanation of anti-cheat. It also easily explains why I personally never install games that use this form of software.