Admittedly I’m biased against that source already, but even then I don’t see how their evidence supports their conclusion.
There’s three main points I can see
1. The proportion of the traffic to their site from google dropped.
This isn’t convincing to me because there’s no evidence it’s because of their conservative viewpoint. Maybe their SEO was just outdated after the update.
2. The fact that a search for “Joe Biden” no longer goes to their site.
If you look at the numbers they’re quite low already, again they fail to demonstrate that it’s because they’re a conservative website that they’re not getting traffic
3. They have a bar graph that shows that “conservative” websites get a less percentage of their traffic from google.
Two main complaints with this, one the coloring of the bars in the graph is totally arbitrary. Two they again fail to demonstrate that the only thing that’s different is the political leaning of the site
I don’t really feel like they’re presenting the data in a misleading way or they’re lying, but they fail to connect the data to the conclusion. Extraordinary claims need extraordinary evidence and they just don’t have it