I'm not a fan of many of google's practices, but still use their traffic data a few times per month because there isn't really any alternative.
Similarly, I bought some bitcoin to donate money to sci-hub, because I believe the good that they do is greater than the negative effects of a single additional bitcoin transaction, and sci-hub doesn't offer any alternative methods. I don't have to like bitcoin to weigh pros and cons and make an educated decision to use it for a specific purpose.
Then as for holding it, I was paid out in bitcoin for a short time and waited a while before converting to fiat in order to not pay miners multiple times. During that time I was both holding bitcoin as well as being of the opinion that this blockchain+PoW tech has lost the novel factor and we should get over the hype rather than spend more and more energy on it when we're already consuming a hundredfold more energy than we can currently produce without direct CO2 emissions.
It's not as simple as: you use it, therefore you must love it (or conversely, if you don't use it you must hate it; some people might be interested in the tech but still not believe it's an investment vessel befitting of their risk profile).