I think the point people are making is that the system in general is so rigged and there are so many bad actors that it’s basically impossible to find something else that is more ethically managed while getting a very similar good/service/whatever.
Do I support the US giving Israel billions every year that then gets used to kill and rule over Palestinians? Nope but I still have to pay my taxes! If I decided to not pay because of that, I’d go to jail. So even though I’d like to not support such a system, the effects of not supporting such a system are too much of a cost for myself. (In the same way for others with goods or services or whatever - penalty for non-participation in whatever is too high)
They aren't saying the team shouldn't exist, or be more valuable. They're saying he shouldn't get the reward, just because he was the capitalist at the top.
Second, I haven't lived in Los Angeles for a long time and have never bothered to pay for any sort of subscription service that allows me to watch the games anyway because they tend to air well past my bedtime, so no, the value of MLB and LAD television contracts is not in any way directly contributed to by me personally.
However, you raise a good point that people in the same group exhibit different behavior and values.
And what about your part in this play? The brand is valuable because of its fans. I assume you continued to support this brand, and by extension, this man you seem to despise. People like yourself directly contributed to his wealth — you might just as well not have.