maven assembly plugin war packaging unexpected output result - maven

Question

I tried using the maven war plugin but is very opinionated on the folder structure and I need specific files into specific folders, so I've looked into using maven assembly plugin with the war format set.
Here's a snippet of the pom.xml.
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-assembly-plugin</artifactId>
<version>3.3.0</version>
<configuration>
<descriptors>
<descriptor>src/main/assembly/war-assembly.xml</descriptor>
</descriptors>
<finalName>${project.artifactId}-assembly</finalName>
<appendAssemblyId>false</appendAssemblyId>
</configuration>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
</plugin>
and the war-assembly.xml
<assembly xmlns="http://maven.apache.org/ASSEMBLY/2.1.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/ASSEMBLY/2.1.0 http://maven.apache.org/xsd/assembly-2.1.0.xsd">
<id>war</id>
<formats>
<format>war</format>
</formats>
<includeBaseDirectory>false</includeBaseDirectory>
<dependencySets>
<dependencySet>
<outputDirectory>webapp/WEB-INF/lib</outputDirectory>
<excludes>
<exclude>*:war</exclude>
</excludes>
</dependencySet>
</dependencySets>
<fileSets>
<fileSet>
<directory>${project.build.directory}/${project.artifactId}/WEB-INF</directory>
<outputDirectory>webapp</outputDirectory>
<includes>
<include>/**/*</include>
</includes>
<excludes>
<exclude>webapp/lib</exclude>
</excludes>
</fileSet>
<fileSet>
<directory>${project.build.directory}/${project.artifactId}</directory>
<outputDirectory>webapp</outputDirectory>
<includes>
<include>/**/*</include>
</includes>
<excludes>
<exclude>WEB-INF</exclude>
<exclude>META-INF</exclude>
<exclude>info.xml</exclude>
</excludes>
</fileSet>
<fileSet>
<directory>${project.basedir}</directory>
<outputDirectory></outputDirectory>
<includes>
<include>README*</include>
<include>LICENSE*</include>
<include>NOTICE*</include>
</includes>
</fileSet>
</fileSets>
<files>
<file>
<source>${project.build.directory}/${project.artifactId}/info.xml</source>
<filtered>true</filtered>
<outputDirectory></outputDirectory>
</file>
</files>
</assembly>
this produces the desired outcome in terms of where i need the files to be copied to, except something still packages lib folder, classes folder and the web.xml into the webapp folder, which I do not want.
Outputted directory structure:
Expected Directory Structure (lib, classes and web.xml) are removed because they are in the webapp/WEB-INF sub folder:
am I using the maven plugin incorrectly? or a setting that I am overseeing? Or a way to set the output directories for the classes, lib, and the web.xml?