The grind

My winrate seems to be declining. I'd do the calculations to find out whether such a hypothesis is true, but I don't know how to. (I do really. Otherwise I'd be stupid.)
Anyway, the last session was just a grind really. It started off badly, as is happening a lot these days.
Well, to be fair, it started off with me being dealt aces the very first hand and being called all the way by Q4 who flopped 2nd pair. However, I was also dealt aces in the 4th hand and I was too stubborn to fold them when the flop was 3 diamonds. I had the ace of diamonds in my hand, and the turn was an ace so I wouldn't say it was terrible. But he showed K♦9♦.
After that I was just faced by idiots playing any two cards and sucking out. This was especially true when I was dealt good hands. I was dealt a lot of premiums this session, but lost with most, such as when I had queens and my opponent played T7o to the river with nothing but a gutshot, which he obviously made, otherwise I wouldn't be complaining about it.
After a while though, a lot of the any2donks seemed to leave at the same time and I began to grind it back up.
I finished up $0.46 after 175 hands (6.57 BB/100 hands).