John Gill Commentary Proverbs 19:3

"The foolishness of man subverteth his way; And his heart fretteth against Jehovah." — Proverbs 19:3 (ASV)

The foolishness of man perverts his way
The sinfulness of his heart and nature; the folly which is bound up in it causes him to go astray out of the way in which he should go, or makes things go cross with him; so that the ways he takes do not prosper, nor his schemes succeed; but everything goes against him, and he is brought into straits and difficulties; and his heart frets against the Lord ;
laying all the blame on him; and ascribing his ill success, not to his own sin and folly, but to divine Providence, which works against him; and therefore frets and murmurs at him; and, instead of charging his own ways with folly, charges the ways of God with inequality; see (Ezekiel 18:25) (Jude 1:16) .