The 2010 MBPs can support 802.11 a/b/g/n. Regarding the MBP by itself the only thing that would affect speed is your type of connection unless there is a hardware problem. (Max spec speeds are a=54Mbps, b=11Mbps, g=54Mbps, n=150 Mbps.)
Check how your MBP is connecting to your router. Then also check your actual speed. Option-click the wireless icon in the top menu strip on your desktop, look at the PHY Mode and transmit rate).
Your actual speed is determined by the type of connection and your signal strength which is directly affected by distance, the router's radio power & any obstructions between your MBP and the router. Signal strength is especially important, as things as simple as a cabinet, window or wall between the router and your MBP can drastically reduce the signal strength and hence the speed.
Also, your router appears to be a DSL router. What is your ISP's service speed? In my area, Verizon DSL maxes out at only 768kbps, which is actually quite slow by today's standards but can support a single video feed.
The router's wireless support is limited to b, g or b/g. You should check how you have the wireless set up in the router. If it's set up for b only, that could explain part of your issue.