I'm inclined to sympathize with your view re UEFI mode motherboards. While there are advantages of this interface vis-a-vis our old comfortable BIOS interface (chiefly its support for the GPT partition scheme, a decidedly superior alternative to MBR), the seemingly complexity of UEFI is certainly a turnoff for those of us used to working with the BIOS interface. In a way it's a pity that the major motherboard manufacturers haven't standardized on a UEFI interface which might make the situation a bit more palatable for us users. Too often (at least in my experience) it becomes a "search & rescue" or "find Waldo" mission to locate a particular setting that one wants to review and/or change. A good deal easier with the old BIOS, that's for sure.
I do wish you would try a disk-cloning program to create & maintain a comprehensive backup of your entire system. The peace-of-mind one gains from having at hand a true copy of one's entire system cannot be overemphasized. And with the right kind of program (which I'll get to in a moment) one can employ the disk-cloning program on a routine/frequent basis so as to maintain a reasonably up-to-date backup of one's system.
The program I strongly recommend is the Casper program. I've been using this program for about a dozen years now and have never found a program its equal, let alone its superior. The beauty of the program is its simplicity of operation, its reliability, and most of all its speed.
I clone my systems a number of times per week - sometimes even daily - depending upon the importance of my data. So I always have at hand an up-to-date complete copy of my entire system. Because of Casper's speed the amount of time to complete the disk-cloning operation is quite reasonable. Naturally the volume of data that's cloned, the user's system, the types of drives involved in the disk-cloning process, will all have a bearing on the expenditure of time to complete the disk-cloning process.
Another advantage of Casper's built-in speed is that it encourages the user to employ the program *before* making any significant changes to their system, e.g., configuration
changes, adding, deleting, modifying major programs from their system, reorganizing partitions, etc. So that in the event those changes play havoc with the system the user has intact a complete copy of a perfectly functioning system at hand - one that needs no "recovery" type process to return the system to its previous functional state. I can't tell you how many times over the years that technique saved me from grief because I made unwise system changes or installed new or modified programs that created problems with my systems.
The program is a commercial one - costs $49.99 and AFAIK is only available from its developer -
http://www.fss.dev
A 30-day trial version is available at https://www.fssdev.com/products/casper/trial/
The trial version is somewhat crippled in that it doesn't have partition resizing capability that the licensed copy contains. But it should give you a good idea of the operation of the commercial version. Try it - you may like it.