Cheers, yours doesn't look too bad - the tailpipe's lined up fine with the silencer. Check this example of botchery. It's not a bad picture, it really is twisted about 45 degrees and the Kwik Fit guy really did try to convince me that that's how Peugeot made them and my previous exhaust was just a cheap knock-off because it didn't have the chrome!!!!
(finger over the numberplate intentional btw

)
As you can see, it's WAY off and sticking miles out the back as well as being far too low. Then here comes their "fix":
I kid you not, he just chopped it off and expected me to be happy!

Thankfully after some "persuasion" I got it fixed up with a short length of chrome tailpipe and some bending and it looks reasonable now (I actually wanted a proper
plain exhaust but the chrome one does look better!)
I'll take a pic of it soon... Probably sometime next year after I've washed it
As for your aerial, it looks like a mobile phone aerial for a car kit. I actually had most of a full Nokia car kit in mine when I bought it, but ripped it out as it was for the old models and I couldn't find a modern phone holder... See if you have a box or 2 mounted under the glovebox somewhere, or maybe just a loose aerial cable (co-ax cable, usually a screw-on connector at the end) tucked away...