Jamieson, Fausset and Brown on Ecclesiastes 2:24

24. English Version gives a seemingly Epicurean sense, contrary to the general scope. The Hebrew, literally is, "It is not good for man that he should eat," &c., "and should make his soul see good" (or "show his soul, that is, himself, happy"), &c. [Weiss]. According to Holden and Weiss, Ec 3:12, 22 differ from this verse in the text and meaning; here he means, "It is not good that a man should feast himself, and falsely make as though his soul were happy"; he thus refers to a false pretending of happiness acquired by and for one's self; in Ec 3:12, 22; 5:18, 19, to real seeing, or finding pleasure when God gives it. There it is said to be good for a man to enjoy with satisfaction and thankfulness the blessings which God gives; here it is said not to be good to take an unreal pleasure to one's self by feasting, &c.

This also I saw--I perceived by experience that good (real pleasure) is not to be taken at will, but comes only from the hand of God [Weiss] (Psa 4:6; Is 57:19-21). Or as Holden, "It is the appointment from the hand of God, that the sensualist has no solid satisfaction" (good).