I don't know why or how Tron or Trx became bad for you. Just from my experience, I don't see anything wrong or bad with it. Especially when I convert or use its network, there is often a low fee that is deducted from each transaction.
What he means by it, is because of the current tight competition in the crypto market, and since Tron hasn't been introducing new innovative updates, they are left behind by their competitors. This is exactly what made them not a recommended investment in altcoins because they are slow to progress and have no development that will gonna make their market increase in the future. Unlike other competitors which have some new and unique features, their investors will trust them more than the others.