Blind installed in a metal/aluminum frame that is tilting forward - how to fix?
Notes here:

front of the brackets for these blinds started bending down.   You know this.
this is either because you were unduly harsh on these - pulling on the blind cords to hard and/or yanking the whole mechanism
this may also be caused because of the weight of the blinds.   Cheap blinds weigh more, couple that with some yanking and the default brackets might not work.
was the top of the blinds caulked to the top of the window trim?   That is really weird!
Most blinds like this come with three attachment brackets.   There is usually one &quot;C&quot; bracket and two box brackets.   The box brackets really hold the weight and are of a thicker gauge metal and the fact that it is a box it is really almost impossible for the bracket itself to warp.   With the box brackets if there is too much yanking or pulling on the blinds the bracket will pull the screw out of the trim, not warp.
All I see on your blinds are the &quot;C&quot; brackets.   While these look nicer, this is the reason why the blinds eventually failed.

What to do?

Buy better and more C brackets, install them, and go easier on the blinds.
Buy different blinds that are lighter
Install box brackets for each blind set.