Rainbow Six Siege on PC has garnered its fair share of criticism, particularly for issues that severely impact the player experience. One of the most glaring problems is the persistent hit registration bugs. Players often report instances where they fire shots that visually and audibly connect with enemies, yet no damage is dealt, a major flaw in a game reliant on precision and strategy​
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. This issue has been acknowledged by Ubisoft but remains a source of frustration for many. Additionally, connectivity problems, such as disconnections and lag, further disrupt gameplay, making it difficult for players to fully enjoy competitive matches​
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Another major concern is the rampant cheating problem. Despite Ubisoft's efforts to improve anti-cheat mechanisms, cheaters still find ways to bypass the system, using hacks that ruin the fairness of matches. This ongoing issue has driven many honest players away from the ranked scene​
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. The toxic player base doesn't help matters, especially for newcomers trying to learn the game, as the community often lashes out rather than offering guidance.

Lastly, the game’s reliance on microtransactions and the grindy progression system have alienated a portion of the player base. With new operators and cosmetics locked behind paywalls or excessive playtime, the game feels more like a cash grab than a balanced tactical shooter​
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. All of these factors combined have led many players to label Rainbow Six Siege as a frustrating and flawed game, especially on PC.