John Calvin Commentary Psalms 44:9

"But now thou hast cast [us] off, and brought us to dishonor, And goest not forth with our hosts." — Psalms 44:9 (ASV)

Nevertheless you have abhorred us. Here follows a complaint, in which they lament their present miseries and extreme calamity. This describes such a change that showed not only that God had ceased to exercise his accustomed favor toward them, but also that he was openly adverse and hostile to his people.

First, they complain that they have been rejected as if out of hatred, for such is the specific meaning of the word זנחת, zanachta, which, along with others, I have translated as abhorred. If, however, anyone would prefer to translate it as to forget, or to be cast off, I have no great objection.

They next add that they had been put to shame, namely, because it necessarily follows that everything would go badly for them when deprived of God's protection. This they declare immediately afterward, when they say that God no longer goes forth with their armies — that is, he no longer goes out as their leader or standard-bearer when they go out to war.