The core of the Scheveninger structures is that they are quiet solid. In critical lines it is like this: White is trying to attack you, but if you don´t get checkmated, you will have all your longterm advantages. (pressure on the c-file, b5-b4, one more pawn in the center)

If your opponent is not attacking you at all, you get these advantages for free. Obviously, because black lacks space, you might need a few moves to untangle. I mean, if you look at your final position, you will recognise, that most of your pieces are solidly placed, but far from ideal. Bring your f8-bishop in the game. (If White stays passive, you might even play Be7-d8-b6.) The rook on e8 has lost its purpose, cause there is no Bxe6 sacrifice in the air. Bring it to the c-file for example (and the other rook to b8 if White continues with his Re1-f1-e1-manoeuvre:) ). The Knight on d7 has the easy route via e5 to c4. Yout bishop on b7 is fine, but somehow in the way of your own play on the b-file. The idea Bc6 was aleady mentioned. (If White does for Nd4, you can drop back to d7 or e8- with the white pieces so passively placed, you don´t really need to keep the pressure on the e4 pawn. f3-f4-f5 will never ever lead to a dangerous attack)

Overall: Just ask your pieces, if they are happy, where they are. In the Sheveninger you make a lot of "strange"/subtle moves, anticipating a White attack. (Re8 and Bf8 for example) If there is no White attack, you can switch your mindset and reevaluate your piece placement by "classical rules".

Well.. I guess there are more critical lines a Najdorf player should focus on. If your opponent plays passively and surrenders the bishop pair then just be happy with the outcome of the opening. At some point you just have to play on your own and an ordinary chessplayer gave good advice how to potentially handle this type of positions imo. If it does not work tactically move by move then just make reasonable moves to slowly improve.. Whites play looks not very threatening.

There is the Scheveningen plan, ...Bb7-c6, ...Qc7-b7, ...a6-a5, ...b5-b4. Or maybe Fischer's hedgehog plan, ...Kg8-h8, ...R-g8, ...g7-g5, ...Rg8-g6, ...other-R-g8. The way your line went, once Ba2xNc4 happens, black can play a well-timed ...e6-e5 followed soon by ...d6-d5 to open the game for the B-pair. The Sicilian is a perfect opening for black if white plays passively.