Dude that's not just isolated to Cavs and LeBron and it's not unreal, it's par for the course. Not saying the hate doesn't exist, but it's not just isolated to them. People want to see GS fail, even before KD, they want to see the Cavs fail, when you are the best at what you do and you have BIG personalities as well, the hate is a normal progression. Notice how, the Spurs have been the winningest most consistent team for what, damn near 20 years now and they don't garner the same amount of hate? They don't have those big personalities...
Shit happens in all sports... NFL, people despise Brady and the Pats, when Floyd was fighting he was the most hated boxer in the sport... Shit happens man...
The Spurs dont get hate because the media tells basketball fans not to hate them. Has nothing to do with "BIG PERSONALITIES", if the media shits on you and talks about you enough you become BIG. Who is hated and who is liked is based on media perception. Thats why dudes on BGOL get mad if you criticize the ones the white media deems as HUMBLE and LIKEABLE like the Spurs. Do a search on BGOL for a Kawhi Leonard troll thread or someone trolling the Spurs when they lose. You wont. All the ones the sports media says you SHOULD be liking get passes, all the ones the media trolls or attacks THEY troll and attack. Slaves.