The Church's position is that anyone who commits mortal sin without afterwards going to confession or having perfect contrition* does, indeed, sentence himself to hell.
What the Church does not have a position on is whether any particular sinner has actually comitted a mortal sin (extenuating circumstances could render a usually mortal sin venial), or whether that sinner might have repented before death. That is up to the mercy of God.
*Perfect contrition being repentance for the sake of the love of God and sorrow at offending Him, not simply from fear of Hell.
Right. There is no way the Church would ever say definitively that anyone is going to Hell for eating meat on Friday.
We might expect our elders to give us hell but that's not the same thing as eternal damnation.