Bridge mode is recommended when using your own router, but first things first:
Could you post a picture of the AOP (main outlet), which the ESX-02 splitter's input is connected to?
Additionally, could you log in to the modem's web interface at 192.168.178.1 and copy the data displayed on the Downstream, Upstream and Network Log tabs on the Advanced settings, Tools, Network status page?
The second splitter (VQ1002) is outdated and should ideally be replaced by a second ESX-02. The connectors on the cables connected to the output should be replaced by higher quality compression connectors.