It looks like you had to stop (traffic lights?) 3 times, so that could habe knocked 0.2 off.
what I thought was interesting was your average heart rate-144.
Now, I clearly dont know how hard you thought you wear working, but given it looks like ypu were trying to get a 20mph average, then I would say you thought it was hard?
vert unscientifically, id say you can go harder or you wre2 pretty fatigued.
Fwiw a lot of my rides are like that, with most being because I dont want to fry harder and fewer because im fatigued.