Wiktionary
rip to shreds
vb. 1 to rip up, so that only shreds remain. 2 (context idiomatic English) to severely devalue, to refute.
Usage examples of "rip to shreds".
What did matter was that everyone thought it existed, and that was much worse, for there was no object or text to ridicule or refute, to accuse, criticize, attack, amend, hate, revile, spit at, rip to shreds, trample upon or burn up.
Everybody, regardless of rank, has the right to contribute his own ideas and rip to shreds those of others.
It was the most grotesque thing she had ever seen, it's evil little eyes darting about the room as though searching for something to fasten its tiny needle-like teeth on and rip to shreds.
Of old such a look meant that Kelemake, the scholar, was preparing to rip to shreds some long-held belief.