… an interesting subject. It has been edifying to be able to read the responses.
If we are created to “
know, to love and to serve God ” , although the OP’s question is from the perspective of
suffering, it is also asking by inference , Why would God create us if some of us would end up not ‘knowing, loving and serving Him ?’ None of the answers presented are possible without acknowledging the free will God gives us . *We can’t get away from free will *(how’s that for an oxymoron ?)

.
Heaven cannot exist without free will - for it wouldn’t be Heaven , and even Hell testifies (in a most terrible way ) to the free will God gives men and angels. As qOcOp pointed out, in Hell, we would still
serve God’s justice .
To project a little more on what Paul Infirdigno posted concerning full knowledge, and considering this comment …
At the particular judgement, those who choose Hell
do know precisely that they choose it ; fully . *During our earthly pilgrimage * however, we are not aware of the full consequences of our actions - of our sins. In that sense, it is comparable with the OP’s analogy :
The demons are in Hell because they chose it - with full knowledge of the consequences of their actions at the moment of their choice . Their choice was one, eternal, definitive act . At the moment of the particular judgement , on that seam of time and eternity, it won’t be too different for us.
God will always offer us His Mercy, be we are always free to refuse

sad_yes

it.
One thing which hasn’t been mentioned in overabundance yet on this thread is prayer. As Catholics we are meant to be a people of prayer and any time we become separated from prayer, we tend towards an incompleteness:
“Lex Orandi, Lex Credendi”
From the perspective of someone else’s suffering ,if our concerrn is genuine, it should seem we personally would want to do what is within our power to alleviate it . Considering the OP’s question again,
I believe one may answer: Souls do not go to Hell because God created them.
From Our Blessed Mother’s words during Her fourth apparition at Fatima :
" Then looking very sad, Our Lady said: “Pray, pray very much, and make sacrifices for sinners; for many souls go to hell, because there are none to sacrifice themselves and to pray for them.”
…