OP said he's working at 20% capacity for one because the tools and documentation are bad. If fixing those problems increases the team productivity by some non-

OP said he's working at 20% capacity for one because the tools and documentation are bad. If fixing those problems increases the team productivity by some non-trivial amount it's a positive data point for a promotion. At my current co, promotions and job levels are measured by increasing impact at an individual level, within a team, across teams, across orgs, etc. Cutting waste is everyone's job.