Time to addmit the problem
The first step is admittance. I see a lot of people admitting they’re not the best but that’s where they stop and start blaming everyone and everything but themselves. But if you claim not to be the best doesn’t this… by definition this mean you have room to improve? And your team mates/the system/what ever else aren’t the ones barring you from doing the improving. The onus is on you.