I still enjoy the show for what it is. I do find it humorous that it's being criticized for characters that evolve and move to new stages in life. Would you really prefer the alternative? 10 years later and they are still all single? I thought we were against nerd stereotyping.
I would prefer Sheldon stay single, there was no need for him to change.
Let's look at Will and Grace. The show went to hell when they tried to grow the characters and make the show 'real' and less funny. To the point where now that it's coming back they will just ignore that shit and have Will and Grace.