Not going to read it again but if I recall it was more than half complaining about things not at all related to kagi search. Stuff like how they manage their finances and administration.
Sure that effects how well they can deliver search at some level but ultimately if their search is better than alternatives then I'm gonna keep paying them.
Wrong gut feeling then. It complains about Kagi not focusing on what their unique proposition is, and then about the t-shirts. That can all be true, at the same time as their core product is still also great.
[0] https://kagi.com/welcome