2013,2014,2015,2016,2017. Two seasons with SHIT o-lines (2013,2017), two seasons with "meh at-best" o-lines (2015,2016) and one season with an awesome o-line (2014). At this point, I don't need to say anymore as it pertains to Flacco's performance relating to how well the o-line is. It speaks for itself.
It's nice for Flacco to point what he needs to address and improve upon, but in a few weeks we play the Vikings, a team with a damn good defense led by one guy that knows Flacco oh too well: Zimmer. If we score more than 10 points in that game, I'd be shocked.