Now that's exagerating.When I saw the crappy effects for ENCOUNTER AT FARPOINT, which were made over ten years after oldBSG, I could only laugh...heck, TOS's effects were better!!!
No, I'd agree. I never really cared for the look of early TNG and always thought that the SFX would date really badly and quickly. Ditto those in Babylon 5. I think the models used in TOS have stood the time pretty well by comparison, given the technology and budget they had to work with.
By and large though, SFX have simply gotten better with time and money and it's not really fair to compare 1960s shows like Lost in Space or low budget shows like old Dr Who or Blake's 7 with your BSGs, SG1s or ENTs. And in another 10 years or so, today's crop or the recent crop of shows will also look pretty dated and shabby compared to whatever is airing in 2019.