Seasons 1 & 2 are my favorites. Yes, I went there.
They contain more swashbuckling adventure, more emotion, and more fun than the brooding future noir stories of seasons 3-7. They are closer in tone to both the TOS and it's films than the later seasons.
The social messages are far easier to digest in the first two seasons because the show is campier, so the viewer doesn't feel like they are being preached at as much. It's like Growing Pains in space and Picard is Jason Sever. It's an idealistic view of the world...TNG, much like a sitcom, was never conceived as a realistic view of the world. It's an aspirational view of society that nobody could ever possibly live up to. Picard can't possibly be right all the time, yet he always is! It becomes a problem (in Season 3 and beyond) when it starts taking itself too seriously.
Seasons 1 & 2 are a 1980s style show through and through. It's the A-team, it's Knight Rider, it's Highway to Heaven. If you hate typical 80s style shows, you will hate the first two seasons. I think a lot of critics came to this show in later seasons or after the show had left the air. You are more predisposed to like the later seasons and DS9 because they are darker and grittier(like modern shows), so everything that came before you can't accept.
TNG was not made for a Millennial geek audience ( you guys have NuTrek). It was made for mainstream audiences of the time. You don't like seasons 1 & 2...your opinion is valid, but the show was not made for you.
I've seen a lot of comments by people on this board and elsewhere, that proclaim nobody actually liked the first two seasons when they originally aired. The only reason people watched was because this was the first new Trek show in 20 years, they say. Well there are a lot of revivals to well loved shows that come and go without much success at all. If nobody liked this show they would have stopped watching sometime during the first season but that didn't happen. The ratings were fairly steady and the show was considered a success. It was a syndicated dramatic show premiering at a time when audiences were not used to watching this type of show in syndication.
Yes, the ratings were higher in later seasons, but most popular shows take a few seasons to build their peak viewership.