One thing in particular that bugs me about Macbooks is the fail-deadly hardware security. Disk encryption is good, yes - I use LUKS myself - but it tends to backfire on regular consumers if done poorly. I've had to tell far too many people that their data is perma-gone from a fried Macbook motherboard. (And no, "they should have used Time Machine" is not a valid excuse for such poor design.)
Such scenarios are trivially recoverable on better-designed machines with removable storage and consumer-friendly software FDE. BitLocker does this reasonably well - yes, there are privacy concerns w.r.t. key backups, but one must strike a balance between convenience and security.
ETA: To be clear, this setup would be entirely tolerable to me, but I (and everyone else in here) is hardly an average consumer when it comes to technology.
There are some security features that (for good reason) get in the way of e.g. dtrace, but I'm not aware of any of those that you can't turn off.
> I'm also not a fan of how Apple controls devices and the market of software after the device has changed owner.
What's this about?