Thanks for the clarity.
So with the engine off and shifting through the gear that just means you’re not dealing with the shaft being misaligned and causing it to bind, it’s not at all a point of reference for the clutch, or TOB’s operations.
First question is when you say “nearly”impossible, and you saying it will still go into gear when the motor is spinning sometimes or are still saying not at all?
The fact that you already changed the TOBs it’s a good start that the chances of the TOB being faulty are minimal. To check that it’s not a master issue, disconnect the bleeder from the tob nipple and press the pedal - if you get a big mess, good chance the issue is not there.
And then it’s time to move on to the clutch’s pressure plate. In which I hate to say it but you need to drop the trans again to make sure that the TOB is even fully contacting the fingers and able to release them from the disc. So that means you need to measure the distance to make sure it’s even working between the 2 *attached images for reference.
Before any of that, can you show me a picture of the clutch disc you installed on the dmf first. I want to rule something out, lol.