Lyric discussion by Vball 

Cover art for Bloodshot lyrics by Jack's Mannequin

It definitely is about how people's lives are bland, pointless, and just tiring. The first verse or two is about a girl who literally starts her day behind everyone else (the mail) and how her exuberance is fading by growing up and paying bills and handling real problems. The next verse is about a Veteran painting his sights from the war. The canvas is red because all he saw was carnage and blood. No one will see this. He's making a futile attempt to show his sights to people. The hill is a symbol for life. It's just too high to climb and by the end of the day, we're all too tired to actually climb it. The last verse is saying how we're in valleys (flat land) and we just keep trying to climb the hill. We start out already defeated.

That's my take :)