I just want to say "Who is in charge here?" Are you trying to tell God what to do?
God promises he'll always love you, he'll always be with you, he's prepared a place for you to be with him forever. He didn't promise you a Ferrari or a wonderful life here on Earth.
I find it quite interesting that you are criticizing the statement "God promises he'll do this-and-that if you do this" then then proceed to point out exactly that which you criticize--God promises he'll always love you, he'll always be with you, he's prepared a place for you to be with him forever.
The people you are criticizing are just pointing out other promises God has made. The promises you point out are not the only ones He made to us.
I do agree with you on your last statement--He never promised us luxury or even a pleasant life here. He did promise that He would always be with us through the hard times, but it's not an unconditional promise.