Fidelity Managed Account lags in performance

My father opened up a managed account in my name as a UTMA many years ago and a couple of years ago he fully transferred it over to me. I really hadn't paid too much attention to its performance and allocations and continued to fund savings into but as I've become more financially educated I feel like it's not meeting the performance results that it should. It's lagging fairly heavily behind the S&P 500 index. I know a balanced, diversified portfolio will have hedges and won't be 1:1 but it also is much lower in it's Sharpe Ratio. Maybe there are other metrics that I'm not aware of but I'm curious if the following returns are worth getting upset about considering my age (41) and my ability to take on a more aggressive strategy.

1-YR S&P - 27% Mine - 17%

3-YR S&P - 13.8% Mine - 6.0%

5-YR S&P - 14.7% Mine - 7.8%