How to make my trimmer to maneuver easier.

The reason is it is seated on the two back wheel, and you have to raise the spin-cup above the ground constantly to move. This is the only way for it to be able to move.
Why don’t they make this machine like he way they made the lawnmower which is seated on four wheeles?

You should ask the manufacturers this question.
But we are so gald we invented the AWAP.
The AWAP resolves all the issues you have with your trimmer.

What is the AWAP and how does it work?

It is easy and simple. The AWAP is an aluminum attachment plate, which equiped with a 5″ detachable caster swivel wheel. Mounted under the trimmer.
Click to view video how to install the AWAP on your Craftsman trimmer

transform any walk behind trimmer in to a three wheeler by install the AWAP

Left photo, you have to push down on the handle-bar constantly to raise the spin-cup above the ground to move the trimmer.
Right photo showed how falt the trimmer seated on the ground. Thanks, AWAP

Visit Review Trimmers Before Buying. Here you can see many difference brands/models. You will have an idea which one is stuiite your needs.

All the issues you have before had been resolved by the AWAP.
It so simple and it speaks for itself. The AWAP is a must-have add-on for any walk-behind trimmers regardless of brands/models.

You are going to like your trimmer like never before. Thanks, AWAP

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Don’t disappoint yourself like those owners
Operating this machine with out the AWAP

Craftsman trimmer with the AWAP installed
Max. Cutting Height 3.5"Minimum Cutting Height 1.5"
Assembled Width 21" Cutting Width 22"
Assembled Height 41.5″ Wheel Size 12"
Assembled depth 46.5″ Line Diameter .155
Engine Displacement (cc) 163 cHandle Bar Positions 1
Engine Brand Briggs & Stratton Engine Type 4 Cycles
Features Adjustable, Foldable Handel Bar Engine Start Coil Start
Fuel Tank Capacity (gallons) .25Oil Type SAE 10W – 30W
Manufacturer Warranty 2 Years Limited
Torque 6.75 Lbs
Product Weight 72 lbs
Assembly Required Yes
Fuel Type Gas