Pulling it off by the tip not only makes a big mess, you could drip on your partner what you just worked so hard to keep out. Both of them will most likely break, and it just doesn't work. One condom, used properly, is as safe as it gets. If that isn't safe enough for you, don't have sex yet. Once most of your penis is covered, you can push the foreskin up again gently.
Lubrication is really important.
Condoms have a high rate of success, but that rate drops when they aren't used properly, and one of the easiest ways to break a condom is by letting it get dry. Buy some lube when you buy condoms. Not only will it help them work better, well-lubricated sex is more enjoyable sex for both you and your partner. If you could buy it in an aisle in the store where food also is, it probably isn't the right kind of lube. Condoms don't have to be a pain.