They also lack many modern conveniences that travelers expect. TXL has a Burger King, a convenience store, and maybe one working power outlet.
Tegel - "New" West Berlin one - not big enough
Tempelhof - "Old" West Berlin (Airlift airport) - closed
Schonefeld - Soviet built crap. BER is being built next to it
I was there recently and it was fine. It wasn't one of the best airports I've been to but no particular issues and decent transport links to the city.
You mean besides the lack of sitting space at the gates like in every other decent airport?
The need to go through an x-ray with all you luggage because of lack of space?
Sure, the train link is good, but you can get to TXL by bus (though slightly trickier)
So, no, a lot of 3rd world country airports are better than SXF