Boost sells defective LG phones and neither company cares!?!?!

I switched to Boost in March of 2019 and am beginning to regret it! I have 4-LG Stylo 4 phones and they are having the same network connectivety issues as Ive read from other consumers. I've been back and forth with both LG and Boost both passing the blaim back to the other. A Boost customer service agent even told me it was a problem with the software on the phones and sent me back to LG. What i don't understand is why i can't get 4 working replacement phones? I spent good money on 4 brand new phones i expected to work. I don't want to send my phones in for "repair" only to be told nothing is wrong with them. All I want is 4 brand new fully functional phones or Boost will lose a good, loyal customer. This SHOULD be a pretty simple and quick solution but Boost and LG want too drag it out because neither company wants to take responsibility to just replace the defective equipment!

Edit: HD streaming is supposed to be included but i can't stream videos higher than 240 or 360 without a lot of buffering or error messages telling me my bandwidth it's too low. I'm not getting what was advertised. Isn't false advertising illegal?