I have a Win11 PC sitting here with a Core i5 8500t, 16G of RAM, 1T M.2 SATA NVME, attached to a three position KVM. Hooked to that KVM are three monitors (2 x DP, 1 x HDMI), wireless keyboard & mouse, Creative USB T60 speakers, and a USB WebCam (logi 970e). Since it’s a PC I use for work it’s Entra joined and InTune managed running Managed AV, MDR, and a DNS Filtering Agent. Oh, and the drive is encrypted with BitLocker.

So I basically have as much USB attached crap as you do, sans hard drives, and it’s going through the USB Hub that’s built into my KVM.

Time from power off to usable desktop for that machine is under 40 seconds.

Your external hard drives are a likely culprit. I’d guess that they are either on an older interface or your PC is set to do a full AV scan of attached drives at boot.

Don’t get it twisted, Microsoft and their products piss me off on a daily basis. I’m not defending them.