The 70's and 80's were both awful decades. It would have been better if we could have gone from 1969 right to 1989. Except for ending Vietnam and electing Gerald Ford, nothing good happened in those years. Everyone was too hairy and the movies sucked. Reagan was probably the worst tragedy to strike during that time.
You're crazy. 1989 was a very low point, and continued at the lowest of low ebbs through at least '93 or '94.
The seventies generally and the early eighties were the high point. My personal favorite was 1977-1983 - basically all my favorite music and style comes from that time.