Compensating or bad network?

[mi...@basewind.com]

I'm trying to see if it's possible to use GoogleWiFi, a free (but badly broken) wireless network in my neighborhood. I'm using an exterior wifi device on my roof to connect to the GoogleWiFi network, and have a SNR in the mid 40s. The signal itself is -32 or so. I ran a cable to connect the external device into my wifi router inside (Linksys running dd-wrt). The free Google WiFi network, however, is frought with problems including broken packets, etc. Despite my 54 connection speed, I'm often getting throughput in the 0.10 to 0.20mbps range.

Is there anything I can do with the configuration (RTS, CTS, fragmentation, MTU, etc) to compensate for the issues in the GoogleWiFi network? I'm hoping to minimize the broken packet issues (perhaps with smaller packet size), and perhaps improve the dismal throughput.

Any advice on where to begin?

Thanks!