But the suffering I’m talking about is not the suffering of the slaughter itself, but the suffering involved in the industrial raising and preparation process.

Why is it okay to eat an animal? (meat / poultry / fish)
After all, I’m killing an animal for my own pleasure.
Don’t you think that’s immoral?
And what about enjoying objects made from leather,
like a leather coat or leather shoes or tefillin, and also a Torah scroll and the like?
I saw online that a certain rabbi answered:
the animal is happy that commandments are performed with it.
Is that a statement with any meaning at all, or complete nonsense?
And another question:
What is the source from which you draw your morality—
the Torah? Or your moral sense?
(I’d also be glad if you explained whether, in your opinion, the Torah has a morality of its own at all,
and whether we are obligated to act according to it.)
Because if you go by the Torah, it seems that the Torah permits using animals for our needs,
whether for eating and likewise for anything else according to the laws (a limb from a living animal, slaughter, and the like).
Of course, in the period of the Torah there was no such horrible industry,
but what is clear is that according to the morality of the Torah there is no problem at all
with using animals for our needs in a proper way,
since our status is higher than theirs.
So for now I thought that I won’t cooperate with the industry,
and I’ll eat only vegan food or animal products that I know come from proper conditions.
But as for using animals in a non-industrial way for my needs, everything is fine.
Is it morally okay to keep putting on the tefillin I’ve had since my bar mitzvah,
or do I need to find tefillin made from carrion?
I’d be glad if you could divide up the whole issue of our use of animals:
what, in your opinion, is a moral wrong and forbidden to do
(from a moral standpoint, and also what is forbidden from the halakhic standpoint in your opinion),
what, in your opinion, is permitted but there is value in refraining from it,
and what you don’t see much moral need either to do or not to do.
(Of course I’d be glad for arguments at each stage of your answer.)
All the best.

(I saw the exposés and was horrified.)

Killing an animal is not such a terrible thing. It is not a human being. As long as there is no suffering, then perhaps it is preferable not to kill it, but there is no flaw in someone who does so for his own use. Performing commandments with it is no worse than any other use.
My morality comes from the moral sense / conscience. There is no such thing as Jewish morality or the morality of the Torah. There is morality.
The fact that the Torah permits something does not mean it is moral. It means there is no problem with it from the standpoint of Jewish law. But a moral problem can certainly still exist. See Column 15.
As for the tefillin, that has already been done. The question is what to do about new tefillin. A family I know found a solution and took tefillin that had belonged to the grandfather. But that of course is not a solution for everyone.
This is not the place to write an entire Shulchan Arukh.