I agree. I'm forever hearing Tchaikovsky, Brahms, and Rachmaninoff trashed. It gets tiresome.
Brahms has a pretty high rep amongst contemporary composers and musicologists I don’t hear him getting trashed all that much.
The music of the great romantics, Tchikovsky, Brahms, Listz, etc. are not heard enough these days. The fact that these snobs trash them explains a lot.