Horrible FM reception

So I bought my truck a couple months ago and first off, I love the truck. But the truck has weak spots.. So I got the 2012 without the touch screen and the antenna reception is horrible. I've never heard a worse radio in any vehicle I've ever owned. I need to fix this shit. I'm very good at anything mechanical and have no issues looking up what I need to do to upgrade but my audio skills suck and I've never had to upgrade a system before.

I replaced the stock front speakers with Pioneer TS-A1675R. Which sound better but still not great. The audio sounds good through bluetooth and XM just not FM. I'm kinda wanting to do a sub setup but my truck is an access cab. Should I just replace the head unit? Or should I take it in for warranty work? I really would like someone to chime in that has had the same issues. Thanks guys..