It's an--off the cuff--smear.   And I will not let it pass a second time. Admittedly I'm not an unbiased observer:   Schubert's 5th, 8th and 9th, the Trout Quintet, the String Quintet in C and the Piano Trios 1 and 2 are some of my favorite music.

i.e.   I think Merle Haggard put it pretty well--I'm sure he was thinking of his reaction to an attack on Schubert, wasn't he?---   "walkin' on the fightin' side of me".