One thing you can do is use a smaller needle. Size 10, if you're using worsted weight yarn, will make your stitches loose by nature.
Another thing to know is that loose loop at the end is one that everyone experiences--it's a stitch that's only secured on one side, so by nature it is loose. One thing to do to minimize the loose loop on the end is either to really pull the first stitch tight as you knit in on the next row, or just slip the first stitch of each row without wrapping it.
Another word of advice. Don't rip it out if you don't like the