Not an expert or trying to sound like one but, there are a lot of posters on this message board that don't understand how QB play works (especially when your OL has a tendency to whiff on blocks).
This isn't meant for you, but for the benefit of others....
if the first read is open, the QB throws the ball there. They don't usually survey the whole field looking for "better" options, then throw to the first option. The decision to look elsewhere would be made pre-snap. So, if the guy covering your 3rd option on the other side of the field falls down and the receiver is wide open, the QB will likely miss that if the first option is open. That is not a mistake or a limitation of the QB. That is how football is played.
Sorry, had to get that off my chest. I've read several messages lately that said "Tannehill missed <insert receiver name here> and they were wide open!!!"