That bike is so bad...from the extremely overtightened BB with very loose lockring...to the plastic brake levers that you can bend to the bar. The welds look as though i did them by heating a screwdriver over a cooker....poor you mate.
If you arent actually ripping the **** then make sure the left hand crank bolt is tight and the bolt that holds the handlebars to the stem is tight. Both are prone to working loose when some poof on a 5-8 shift cant be bothered to do the job right or even if you are building it yourself.
Danoliver,older cheap bikes are actually decent. I had to service a 6 or so year old apollo(old couple) and they works better than the **** i have to build from new. Each year they get worse and worse.