I can't see any scope for movement in the right hand end.
I have some blinds where, to get them out, you lift the non-corded end a fraction, then pull it towards you. There is a slot for the axle to move along. To prevent it coming out accidentally, there is a matchstick-sized wedge that pushes in to block the channel in the fixed plastic bracket that the end of the blind slides out along.
I think I've had some where you lift the end of the blind and one end of the axle lifts out of a slot in the bracket.
More photos, both sides, from multiple angles, including above, may help.
if you need to remove one of the metal brackets, fully unwind the blind first, that will make the roll thinner and give more room for your screwdriver. If you have an identical blind at any other window, see if you can work that one out.
You can see the roller is too long, it is pushing on the left-hand bracket and bending it sideways.