Nah, it is the objective truth. If it was a good console it would have sold well and not have such a short shelf life.
Seems like you don´t know the facts.
Library wise: DC has Soul Calibur, according to Metacritic, still the best ranked fighting game ever, and it´s 2nd on the top 5 of best games ever made, just behind Ocarina of Time. Sonic Adventure 1/2 are still considered the best 3D sonic games ever, along with Generations, to the point the third live action Sonic movie released last year it´s basically the live action of Sonic Adventure 2.. Shenmue set the foundation to what should have been a realistic open world adventure, Jet Set Radio made made popular the Cel Shading graphics, PSO was the first console MMO, Quake 3 Arena brought online crossplay between console and PC (and Capcom vs SNK 2 made it in Japan between PS2 and DC), Virtua Tennis made tennis simulators fun and put realistic graphics on them, the 2K sports titles are still relevant to this day (at least NBA), and they all started with DC 26 years ago. The Capcom Fighting Colection 2, which it´s brought by Capcom this 2025, it´s basically plagued with Dreamcast games (power stone, Capcom vs SNK 2, Project Justice, SF III which is CPS3, but also was on DC), it has lotta cult classic titles on it´s catalogue like SF 3 Third Strike, Marvel vs Capcom 2 (games that are relevant to this day on pro competitions like Evo), Guilty Gear X, Rez, Ikaruga...
Also, it has some of the best console versions of 32/64 bit ports praised back in the day, like RE 2/3, Soul Reaver, Dino Crisis, Pro Skater1/2, Spider-Man, V-Rally 2, Rayman 2, Tomb Raider 4,5 and 1..And even it has unnoficial perfect enhanced ports of MGS, GT2 and Tekken 3...And now lately Doom 64 (with vertex lighting and bump mapping), Star Fox 64, Mario Kart 64, Wipeout Oh...and don´t forget the recent ports of GTA 3 and Vice City!
So, a console which catalogue it´s still remastered to modern systems to this day, with games which made a foundation to what we have had within the last 2 decades, titles still praised by it´s quality even 25 years later, and even some had wide impact on popular culture, beyond gaming, not just the Sonic movie, games like Crazy Taxy are still highly remembered to this day, to the point The Offspring put Crazy Taxy videclips on their backdrop screen for its current shows (2025) when they play All I Want...a song which was very popular years before DC, so they had no real reason to make this, other than Crazy Taxy, a freaking Dreamcast game, was one of the many DC titles who transcended.
And sales wise...DC had the most succesful console launch to date on NA release 9-9-99, with $100 million in first-day sales in the US. Not even PS1 achieved that in 95. Also DC sold more than 9,2 m of units globally, most part of that on the west, when it lasted just 18 months....Yes, of course PS2 stomped it on the market, but DC wasn´t making it bad at all. Probably it would had took the second spot, on sales...Xbox in someway, you could say took DC´s spot. But also, if you compare with Saturn, which sold a little bit more thatn DC, but was on the market for 6 years...
DC failed because of Sega itself and their failures before DC which make people losing confidence, and also for Sony, because of the outstanding work with PS1, making people just willing to wait for the PS2, instead on jumping into another consoles...and also, a little bit spiced by the hype created by Sony itself stating PS2 was basically a machine leagues ahead of DC (which wasn´t true, despite being more powerful), and, of course the DVD.
The controller was indeed bad. If the console didn't die prematurely, it would be alive during the standardization of the dual analog controls in almost every game that has aim and camera controls.
Sega would have to make new dual analog pads and early DC adopters would have to buy them and pretty much throw away the originals.
The analog triggers were quite an innovation, specially for racing games. Even modern consoles like Switch 2 lack of those. The VMU stuff was also a great hook for the kids from that era (in fact, it still surprises people who didn´t know DC had that). Control was decent for 2d fighters, good for 3d fighters...horrible for fps...that lack of second stick was pretty fucked up, but back in the day (99-01) we weren´t that used to second analog for camera movement, even early GCN and PS2 games like Star Fox Adventures or GTA 3 itself doesnt use the second stick for camera movement...