The way I saw it, before the first foul, UConn was clicking and seemed to have some momentum going. Griner appeared to be frustrated, and the flagrant foul was a result. It appeared an intentional grabbing of Dolson's arm to prevent her from getting down court. The refs got it right.
The second incident also appeared to be intentional. Dolson had Griner boxed out with her arms outstretched to the sides in anticipation of a rebound. Brittney brought her right arm over Dolson's shoulder and pressed it into her chest while simultaneously bringing her left arm down pinning Dolson's left arm against Griner's body. Griner then brought both arms down, slamming Dolson backward to the floor. There was no doubt in my mind that it was a Flagrant Foul. However, the lead ref (normally on the baseline), didn't seem to be on the baseline to observe the play. The Center ref, (who called no foul) when Stef was on the floor, was not in position to see the play, being behind Griner. The Trail ref probably couldn't see it either, several players being in the way. It should have been reviewed for a flagrant.
I believe both plays resulted from Griner's annoyance that the game might have been slipping away. I also believe it was the dumbest move she could have made in a game that didn't mean anything of substance to either team. Those two plays will be significant motivation to UConn in the likely upcoming game - the one that really, really counts.