Given Windows' absurd amount of backwards compatibility, chances are pretty high that there are a lot of sleeping dragons buried inside even modern Windows 10/11 kernel and userland that date back to code and issues from the 90s - code where half the people who have worked on it probably not just have departed Microsoft but departed living in the meantime.
Also contrary to Linux, Windows 11 (optional on W10) uses sandboxing for kernel and drivers.
Since Windows XP SP2 that Windows keeps getting mitigations, Microsoft has security teams whose day job is to attack Windows.
They are also promoting using CoPilot for C and C++ code review for some time now.
While it won't stop all attacks, it is better than the whole UNIX is safer than Windows attitude from the 90's, turns out it is a matter of how much money is into it.
Want really safe above anything else, look into Qube OS with its sandboxing over everything, or mainframe systems like Unysis ClearPath MCP, with NEWP as systems language, and managed environments.