Oh, sweet mercy do I empathize with your experience. I nearly drove myself to the loony bin trying to get a close shave without turning my face into taco meat. I might get lucky with a few good shaves before inevitably mutilating myself and blaming the equipment. I did not make real, lasting progress until I hunkered down with the same razor, blade, brush, and soap for at least a month.
Changing variables while learning hampers your ability to identify when you are damaging your face and whether the damage is a result of disagreeable products or poor technique. Changing multiple variables at once prevents you from realizing which product, if any, caused irritation or if you only got lucky with good technique on the previous shave.
Sticking with the same setup for a prolonged period of time--e.g. longer than a week--will help you define the qualities of optimum performance for each aspect of the shave. Eventually, you will be able to dial in any product without enduring unnecessary suffering. For example, soaps: you will figure out how lather should look and feel for optimum performance, and how water:soap and time lathering impact performance. This knowledge help you determine when you need more soap, water, or time lathering when trying a new soap. This knowledge will, in turn, help you identify the differences between brushes...
My only recommendation for your current setup is to change nothing, give the setup more than a week, and resist a third pass for as long as you can! Why do you want to change the blade already if it gave you a BBS after two passes?
Changing variables while learning hampers your ability to identify when you are damaging your face and whether the damage is a result of disagreeable products or poor technique. Changing multiple variables at once prevents you from realizing which product, if any, caused irritation or if you only got lucky with good technique on the previous shave.
Sticking with the same setup for a prolonged period of time--e.g. longer than a week--will help you define the qualities of optimum performance for each aspect of the shave. Eventually, you will be able to dial in any product without enduring unnecessary suffering. For example, soaps: you will figure out how lather should look and feel for optimum performance, and how water:soap and time lathering impact performance. This knowledge help you determine when you need more soap, water, or time lathering when trying a new soap. This knowledge will, in turn, help you identify the differences between brushes...
My only recommendation for your current setup is to change nothing, give the setup more than a week, and resist a third pass for as long as you can! Why do you want to change the blade already if it gave you a BBS after two passes?