I did the same thing back in 2021, put about 600 a month into a total market fund instead of paying down my 30 year faster. Two years in the market dropped and I panicked and stopped buying for a while, which was the actual mistake. The folks who came out fine were the ones who just kept putting money in every month and didn't watch the balance. Six months is way too short to judge it, so give it a couple years before you decide your uncle was wrong.