Except in this case it's clearly affecting at minimum the rest of OP's team.
At that point it's not one person being obnoxious and never approving their team members diffs and more of a team effort to do so.
But at minimum if you have a culture of trying to improve your codebase you'll inevitably set up tests, ci/cd with checks, etc. before any code can be deployed. Which should really take any weight of responsibility out of any one member of the team. Whether trying to put out code or reject said code.
At that point it's not one person being obnoxious and never approving their team members diffs and more of a team effort to do so.
But at minimum if you have a culture of trying to improve your codebase you'll inevitably set up tests, ci/cd with checks, etc. before any code can be deployed. Which should really take any weight of responsibility out of any one member of the team. Whether trying to put out code or reject said code.