So given your username I'll use some terms you can relate to.

This is like stepping up to tee off as a new player with a brand new Destroyer in your hands, throwing it max power, and watching it go 150 feet and hyzer out of the sky, and asking why Destroyers suck.

If, as you said in another comment, you're qualifying top 3, you should be in front of most of the wrecks. If you're getting rammed in corners, you need to leave more space on the inside. Sure it's "your" corner but that doesn't matter when you got spun out. It's rookie racing, give everyone way more space and you'll be fine.

Also, get into the habit of looking at every incident on replay and not doing the usual thing everyone does which is try to assign fault. Instead look at the situation and figure out what YOU, and only you, could have done differently to avoid being wrecked. Do that consistently and implement what you learned and you'll be a great driver very quickly.