after she knew she was going to lose the game after the steal & basket from Alyssa Thomas. Collier appeared to have aggravated an earlier ankle injury she had in August or early September.
In game 4 it appears Minnesota was the more physical team especially in the 1st quarter but the Mercury rallied back to tie the game at halftime. I remember in the 1st quarter Minnesota set a good legal screen on Alyssa Thomas that knocked her down. Other teams can try to bully Alyssa Thomas but it is not going to work because she is probably the strongest player in the league.
I don't see anything obviously bad as far as officiating and basketball can be a hard sport to officiate I was an intramural referee over 20 years ago and it is hard to see plays like who knocked it out when it was 50/50.
This link has a good picture of the play: https://www.si.com/wnba/lynx/news/lynx-make-big-napheesa-collier-decision-for-game-4-vs-mercury Collier actually initiated the contact by holding Thomas to prevent her from stealing the ball.