Simplify the following text for a Grade 14 native English-speaking person.
Original: This has included criticism for including proprietary software , with GNU founder Richard Stallman commenting : `` No other GNU\/Linux distribution has backslided so far away from freedom .
Simplified: This has included anger for including proprietary software , with GNU founder Richard Stallman commenting : `` No other GNU\/Linux distribution has backslided so far away from freedom .