What does this mean? Do you have examples from major works?Tchaikovsky was not good at form. But really, he was a first-rate composer. I think some composers were jealous of Tchaikovsky's ability to captivate the public with his beautiful melodies, while their works were much less popular. Also, some classical music lovers are snooty and disdain what the average "Classic FM" types like.
If you haven't listened to Tchaikovsky's other symphonies and ballets, you're missing out.
Disclosure: I rarely listen to Tchaikovsky nowadays, but he is essential for those new to classical.