At 4 weeks old, it's so young that it's not going to taste good. Give it 3 months of aging, it will probably be totally different.
In the future, don't bottle on kit schedule. After the wine is cleared, bulk age at least 3 months, so you're bottling no sooner than the 4 month mark. Wine goes through a LOT of chemical changes during the first 6 to 12 months of its existence, and more time in bulk gives it a chance to do this as a whole.
If the wine is thin, adding glycerin helps, 1/2 to 1 oz per gallon.
I assume you purchased WE? Which grade of kit? Classic makes an ok wine, Reserve is better. The higher end kits make a better wine, but I'm not sold on whether they are worth the extra money.