It is not. If you would like better service on a route or a new route to connect certain points, that’s great; take it up with Metro. The road investments in the TMP are meant to improve speed and reliability on extremely high-volume routes, because that’s where the big payoff is.
For all the faults of Metro’s network, it does connect the very highest-density neighborhoods to each other and put the most buses where there’s the most demand. And that’s exactly where the city should be focusing its resources. It doesn’t mean that people think your route has “no demand;” it’s just not an all-star, and it’s not likely to get the very short headways that justify heavy capital investment.