A nonprofit board has one employee: its executive.
Most frequently thanks to term limits (which I firmly endorse), it is not unusual for some portion of the board to not have been present or a part of the process in hiring the current executive. And, it is also possible that "new members" may not have a fondness for the executive especially if when they begin their terms, their are multitudinous issues. Of course they might have done their homework before agreeing to join and/or their recruiters may not have been very good about sharing all the facts. Or maybe it's just about personalities.
But, particularly in these times, one very bad behavior I have seen is board bullying. Some of the new "savior" board members take-on the position that the exec is just not right for the times and should be replaced although no one actually says this outright (although they may be correct). Sadly, many boards do not have strong evaluation programs in place; haven't been measuring for results; and/or, have just never understood what is really going on (see my 7 Warning Signs). Most important, board polite often gets in the way of board direct & honest which can get in the way of open communications of expectations and satisfaction.
Executive bullying, often evidenced by setting up hoops to jump through, is not healthy for anyone or the organization. Examples? The board requests more reports with more detail to be provided in shorter time-frames and then never accepts these as good enough and asks for more or different. Or suddenly the board is meeting in executive session, a lot, and then barely communicating the outcomes (likely because there weren't any). Ah, it can get ugly and eventually the exec gets tired and all the distractions mean that nonprofit production is significantly down.
Sound at all familiar? For sure, there are better ways to do business.