Il trouve à redire à tout.

English Translation

He finds fault with everything.

redire (v)
trouver à redire (à) = to find fault (with)
l’organisation était parfaite, je n’y ai pas trouvé à redire = the organization was perfect, there was nothing I could find fault with ou I had no complaint to make
© Larousse 2014

“Il trouve toujours (quelque chose) à redire.”, feels more natural.

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