@GoSoxAV8You aren't alone and they haven't changed anything yet as far as I can tell. I'm an average, solo queue player and get matched with players worse than me and against players better than me all the time. It is horrible, especially when it does it 10 games in a row which it does fairly regularly.
Your example of trying to get your step brother into Apex is exactly what Snip3down complained about a few months ago when trying to play Apex with his wife who is not as good as he is. She was getting destroyed and they both had a horrible time.