Sounds like you have very sensitive skin. Before making any big purchases, I recommend going back to basics with a design that keeps the blade very rigid. My best suggestion to you is an Old Type. It is easy to find the Old Type sweet spot. Start by shaving neutral and slowly lift the handle up. As soon as those OC shaving cream lines disappear on your skin, this is the sweet spot.It does sound a bit nutty but that's exactly what I did. I kept thinking I just haven't found the right blade yet but not the case. I did figure out the angle and it is different from the Merkur. I also realized that every razor I have owned except for this has been some version of Merkur. I did buy a Chinese Futur knockoff to keep at a weekend place. It actually shaved quite well.
I have a Timeless in my cart but haven't pulled the trigger yet. I'm thinking if I can find a fairly aggressive non adjustable that just might be the ticket. I rotate my soaps and blades but not so much a razor. I'm not into the hobby aspect as I once was. I don't really enjoy shaving to be honest. I don't hate it either. I do want to make it the most enjoyable I can though with excellent results. So I tinker like everyone else but maybe not for the same exact reasons.
As far as the BST I tossed the box. If someone wanted to make a reasonable offer I would probably sell it but it will probably just sit under my vanity. In a couple years I will rediscover it. Think maybe now I can tame it. Will have the exact same results and put it away again. I suspect many of us are like that.