Maybe because scooby doo was my least favorite cartoon as a kid, on Saturday mornings it came on once the good shows were done and it was time to play video games, but I didn't mind Velma. It wasn't great, I'm not going to go out of my way defending it, but it was a solid okay. I don't get the hate, it seems overblown for a mid show. It had some jokes, solid sleep time show rewatch (to ruin any credibility my opinion has, brickleberry is in the same category for me).
The 90s Scooby Doo cartoons were pretty awful cash grabs and a far cry from even the first, what 3-4 Scooby shows. Everything from Scrappy Doo until the 2000s reboot (Mystery Inc, which my kids LOVED) was junk.
Scooby Doo started truly scraping the bottom of the barrel when they decided the ghosts were real. The one thing I respected the original show for was that it was about being a skeptic and overcoming your fear of the supernatural, because the supernatural wasn't real.
It's a shame that the first episode is the worst of the season. I also think it was ok, but my wife (who's not terminally online like us, and didn't knew the discourse around the show) loved it and couldn't get why internet hated it.