unskilled

not having or showing or requiring special skill or proficiency

• “unskilled in the art of rhetoric”
• “an enthusiastic but unskillful mountain climber”
• “unskilled labor”
• “workers in unskilled occupations are finding fewer and fewer job opportunities”
• “unskilled workmanship”

lacking professional skill or expertise

• “a very amateurish job”
• “inexpert but conscientious efforts”
• “an unskilled painting”

not doing a good job

• “incompetent at chess”