I am not sure it is worse, crazy and ryno, but I think it is a problem in some leagues. It may not be intentional and I don't think it does require people to trade those extra regulars with the hoarder - often people "upgrade" meaning instead of drafting a player they need at a position that is not covered, they draft the best player at any position available, thus having an all-star SS or 3B or C and a HOF one. They don't want to give up a very good player for too little - as they perceive it - and so there are fewer regulars floating around the league at that position. Multiply this strategy by several owners and you find that good players are harder to find.
But I also think that hoarding draft picks is problematic - some owners with a lot of experience are able to stockpile draft picks and that makes it a less competitive league as well.
There are two ways to deal with all these issues - tanking, hoarding, gaming the system: both take many forms - one is to create the institutional arrangement that will create a disincentive to act in these ways. This is effective up to a point - but it takes as its point of departure the assumption that people are always in every case rational individualists who maximize value to themselves in a narrow sense without taking other values or concerns into account.
The other is approach owners as members of something larger, a league, a network of relationships, a participant in a community, someone who values the integrity of the activity itself - their work, the citizenship, their art or science, or in this case the game they love, and as a member of something, a league or even a larger WIS-playing community.
So in this case you approach people's enlightened self-interest. If you stockpile players or draft picks, use every trick in the book to your benefit, tor abuse people in sitemails or forums, take advantage of those with less experience, you start to have trouble getting people to trade with you, sign up for your league, and so on. If you abandon bad teams after you have had winning seasons in a prog league, you start to get a rep. If you engage in accusations, acrimony, start arguments frequently in a league, you hurt the integrity and risk the existence of the league. Then you can't play. So these activities, which from a private-individual, market gain-maximizing point of view are logical activities to gain profit, are in fact counter-productive beyond the immediate moment.
Over time, since it is not unconnected anonymous actors who are not the same day to day but mere personifications of market relations, as if what I did yesterday has no bearing on what I do and what happens today as in the abstract models economists make their living thinking up, who play here, but actual people who wil then encounter each other again in a few days or weeks, relationships, and leagues, not individuals are the prime unit of analysis that is relevant. That needs to be explained to people, but if they grasp it, they understand why it is not in their interest to take short-term advantage to the fullest extent of a temporary privileged or advantageous position. Instead, in rational individualism theory, and in game theory, or in economics as usually approached, these behaviors are encouraged, or taken for granted as "human nature."