They're both related to owners buying and running clubs as investments instead of as part of the community. Two prominent examples of multi club ownership are the Red Bull group and the City Football Group, both of which own clubs across Europe, North and South America, and Asia. Both are massively wealthy and can bankroll teams across the world and use them as feeder teams for each other. Red Bull started with a club in the fifth tier German league and eventually made it to the top division, circumventing the fan ownership rules in the league. People hate them because it's a corporate team which is particularly unpopular in Germany. They have none of the history or community feelings that nearly every other club does. The UAE government bankrolls CFG so it's also a sportswashing tool. From a sporting perspective CFG is incredibly impressive. Plenty of clubs have shown that spending money doesn't automatically make a club successful, while Man City has been one of the most dominant clubs of recent memory. From a fan perspective it feels wildly unfair (Man City has likely broken tons of financial rules but have been able to tie things up in court so long that any punishment will be irrelevant). Americans tend to be terrible owners because they don't understand the sport and think that it's like US-based leagues. They've driven plenty of clubs into the ground with terrible decisions and don't bother trying to understand the community or why people are fans to begin with.
