The Brett Kavanaugh nomination is clear nepotism, clear quid-pro-quo, and he is clearly a staunchly conservative, far-right ideologue, being vetted for such characteristics and accordingly blessed by the Heritage Foundation. His nomination process was corrupt, and presented to the public in a dishonest manner, since he was clearly already 100% selected for the job before Kennedy retired. In fact his selection was a pre-condition of Kennedy's retirement. So there was no "selection process" and the representation to the public that there was any such process was a blatant, unmitigated lie.
Putting all that aside... he seems to be a perfectly normal, sufficiently educated/experienced, far-right, staunchly conservative Judge that will side reliably with the Republicans on every issue. He's not, for example, some reality show clown with no prior relevant experience for the job, or an accused child molester, or a Westboro Baptist church fanatic, or some conspiracy theory kook, or a wife-abuser, or convicted killer, or...
In other words, the current opposition to his nomination is based on political/ideological/strategic/fairness/policy concerns, rather than any problem with his individual character.