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What you are showing there is what's called and "S" trap. What you want, however, is a "P" trap. You can easily cut the pipe where the last fitting attaches, add a PVC compression fitting and switch piping sizes to 1 1/2" and get rid of most of the plastic in the way in the vanity.
Two things are of issue with the way it is currently installed.
1 with the vertical drop increasing water speed into the "S" trap the trap will not seal correctly at the weir
2 the S trap is prone to a vacuum on the crown side that will suck the water over the crown and loose the seal.
To properly plumb a P the distance from the weir (the lower loop) to the crown ( the furthest edge that the plumbing turns back to vertical) should be 2X the weir. IE if the lower loop is 4" the distance to where it drops into the vertical pipe back into the floor should be 8"
Using a smaller diameter pipe will make all of the "math" easier
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