Most scopes have and adjustable eye piece/ocular lens. I have to adjust mine to the point that they look fuzzy to others, it allows me to shoot without corrective lenses.
Aim the scope at the sky or white wall and adjust the ocular lens until the reticle is sharp and clear. You might have to make some fine adjustments keeping the reticle sharp and clear. If that doesn't work you will need to buy a adjustable parralax scope or see a eye doctor that is an accomplished shooter.
Why put a .$300 dollar scope on a $150 rifle? A rifle at $150 is not a precision instrument but it will go bang most of the time. A $50 scope is made by the cheapest labor availible with the cheapest materials that will allow it to still look like a scope. It has no proof of reliability other than to try and use it,most reviews say its cr-p and you have found this to be true also. You don't have to spend 300 on a scope the are plenty of usable/reliable scopes in the $100-$200 range. At $50 nobody is going to spend anytime checking function, if you can see through it, it's good to go.
