It's very much a product of its time. There are still a ton of good jokes in there, but there are at least a few jokes per episode very clearly punching down and mean-spirited in a way that's very uncomfortable, or just plain tone-deaf to modern sensibilities. If you can let those roll off you as being a product of 30 years ago, you can still enjoy it.

Incidentally, it's not just Married With Children... there's tons of problematic stuff from this era. Family Matters was a very progressive family sitcom for the time, but it still eventually turns into Jaleel White doing an offensive generic Asian accent pretending to be Bruce Lee.