Bar blades need to be sharpened regularly, and yours has been neglected: it looks very blunt. Remember to balance the blade as you grind it, and remember you must finish up with a straight cutting edge, not one that curves back as you move toward the tip.
Personally I do not regard bar blades as a competitive cutting system, compared with swing-out blades on a blade disk. The quality of cut is inferior, they get blunt too quickly, they are dangerous to use, and they cost too much to replace. My favourite mower is an early 1980s Honda, and it had a Ninja blade when I got it, but now it has a 4 blade disk system from an HRU model. The cut is just incomparably better, and it is a lot easier to maintain. Better yet, it was a straight bolt-on modification, using only Honda parts (which were junk from a dead mower). I don't know if there is a readily available conversion for your Husqvarna, but in my opinion it would be a considerable improvement if you find one.
