Toasted twice

Within two months lightning has toasted ethernet switches plugged into gen 2 router. Cables supplied TVs, computers, etc. I had switched from landline to VOIP with Ooma which is now DOA. My concern is do I continue to hardwire or just Wi-Fi? Streaming for entertainment and general communication is the level of broadband use. Will there be a visual loss on the TVs and PCs? At present I am unsure of wifi dongle status. I replaced the ethernet switch killed in second lightning. Will test others and cables. Thanks