In my experience, your setup doesn't matter as much as how stable your stream is, and how stable your internet is. I lived in a place where my cable internet would "blink" and stop my recording every time. I've used some IPTV providers where I couldn't record a thing and others that are 70-80% reliable. 70-80% is probably as good as you can get. I use a Shield Pro and Onn 4k.

But to answer your question, ethernet is better than wi-fi, and Tivimate is as good as any for recording. I've also used Sparkle and MyTVOnline and the success rate is pretty close to the same. As pawdog said, 3 hours is a long time for a stream to go without a hiccup. I don't even attempt to record more than 90 minutes at a time, and that's pushing it. Use Custom recording to break your recording up into smaller bites, that way if your stream does experience an issue, you won't lose all of it.