Recency bias. I'm sure if you pull up past "Around the NBA" threads you would see debate on officiating as well. Last year was really bad from what I can remember. The players and the refs had a special meeting to hash out some issues around the All-Star break last season because there were so many poorly officiated games and a ton of technical fouls being assessed for players calling out the officials.
This year has been bad but I think the officiating has been really poor for the last 3-4 years or so. I think it took a hit when Lebron went back to Cleveland, not that that was the cause but that's just something to note the time when it became really noticeable, IMO. If you watch Inside the NBA you can see terrible calls weekly on Shaqtin a Fool because it seems like Shaq has been throwing in one terrible no call almost every other segment he does.
Here is one Shaq's end of the year compilations. It's from the 2015-16 season with the top 5 uncalled travels. I think he started doing the year end compilations that year also.
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