I know this topic has been posted but the answers I saw were not helpful. 

This is not normal or acceptable.  If I use the same client and config on my laptop the VPN works just fine.  No noticeable degradation of upload/download speeds.  Using the VPN client on the router results in <10mbs of typical 160-200 mbs with or without a local VPN client on the laptop or phone over the router WIFI.