ST:TNG worked better specifically because it was not serialized for the most part, and individual episodes were not building toward some specific thing that had to be modified and rewritten and adjusted every time the network messed with the show or cancelled it. It was also generally possible to enjoy episodes after having missed several, as for the most part there wasn't a lot of long-term backstory to need to be acquainted with just to follow the plot.
And as much as B5 was revolutionary in its use of CGI, that CGI has not aged well, and the physical models and film-capable special effects of ST:TNG. On top of that, they didn't keep the files so they can't spruce-up and rerender the scenes in newer versions of the software for higher resolution and alternate aspect ratios, so it'll never look better than it did as-recorded in the nineties.
If Michael O'Hare hadn't been forced to leave with no good explanation at the time (I have heard about his mental illness subsequent), if Mira Furlan hadn't gotten tired of being a Minbari and forced them to write a way for her to have her hair again, if the show hadn't gotten cancelled at the end of Season 4 and also saw both Claudia Christian and Jason Carter leave, and if a whole lot of loose ends had gotten tied up (like making a point of recording Talia Winters but never making use of that after she was de-fugue-stated by the Psi Corps), then perhaps it would have had more of a chance up against ST:TNG, but it just had too many off-set problems and those issues affected what we saw.
Don't get me wrong, I like the show and plan to introduce my wife to it once we get the TV movies and the other miscellaneous bits that aren't in the five individual-season boxed sets, but it's far from perfect.