Wait about 3 days and mow again then observe if it looks better than last time ?Your grass looks so limber that the wheels seem to just push it over and it does not spring back up.
It must really grow fast!
Very tall grass does not mow well...it just gets pushed over.
Do you have the blade spacers on the wrong side of the blades? One of my guys just done that on one of our Scags and it cut almost just like your picture. Luckily the other guy called me to say that mower was cutting really bad. They'd just put new blades on right before they left. I drove to the sight looked under the deck and sure enough had the spacer under the blade and not on top of it. He'd already mowed about 1 1/2 acres so he got an ear full. Anyway i knocked the blade off watched for a minute and problem solved. Back to the shop and finished my coffee.