The Onkyo HTIB systems at least come with a fairly normally featured avr, albeit not a very high end one, compared to many brands of HTIB (home theater in a box). You can probably replace the avr fairly cheaply, try accessories4less.com for a refurb (but make sure you know the terms). Usually the speakers/subs with HTIBs like your Onkyo are pretty low end, tho, and most of us wouldn't buy a new avr for those speakers particularly. TLSGuy just doesn't like avrs, he prefers his avrs without amps (like the Marantz he uses). I use an avr from the Onkyo HT-RC series from a few years back which is doing just fine (bought separately from the speakers), it was basically same mid-line avr they offered under a different model name at the time. Maybe this one
https://www.accessories4less.com/ma...-x-80-watts-bluetooth-a/v-receiver-new/1.html
Sure, cheap consumer electronics have issues....so do tvs; you might say real home theaters don't use tvs, they use projection for example, altho a tv can work well....like TLS is doing. Refrigerators, washing machines etc....are they all made for lifetime service as they once were? No. Such is life. Such is our current economy....if you're a doctor with multiple homes like TLS it may be easier for him to buy higher quality electronics, but for many consumers, consumer electronics offer a certain level of value and functionality.