You're right! If the Republicans had firm control over the house, these shit heads wouldn't have the power they do. However, the current house has a razor thin margin, 213 Democrats and 222 Republicans, so losing 5 Republicans and they can't pass anything. This has given that small portion of ultra right wing reps (Boebert, MTG, Gaetz, etc.) a ton of power over the Republican Party.
Ok, as someone from Colorado, District 4 is super fucking rural... Think 23.3 people per square mile (District 1 is Denver, 4,678 people per square mile). These people are Trump people, and Boebert is a Trump bootlicker, this is not a surprise. She changed districts because she knew she couldn't win her old district.
Colorado has 8 districts, so this is the result of 1/8 of the population, and easily the most red. This is not a representation of Colorado, Colorado is firmly blue and most of us fucking hate her guts.