No. Term limits have no bearing on the skill floor, only the skill ceiling. By capping employment at 8 years, you place a hard limit on how good your employees can become. However, removing that limit does not magically make all of your employees good. You are still responsible for choosing to employ competent employees. If, after 8 years, an employee is still not good at their job, you have the option to fire them. That American voters are currently not exercising the option to fire bad employees is its own problem, and not a problem that is reasonably solved by mandatory firings, because the underlying cause is still there and voters who are inclined to vote for bad employees will simply choose to employ new bad employees.
No. Term limits have no bearing on the skill floor, only the skill ceiling. By capping employment at 8 years, you place a hard limit on how good your employees can become. However, removing that limit does not magically make all of your employees good. You are still responsible for choosing to employ competent employees. If, after 8 years, an employee is still not good at their job, you have the option to fire them. That American voters are currently not exercising the option to fire bad employees is its own problem, and not a problem that is reasonably solved by mandatory firings, because the underlying cause is still there and voters who are inclined to vote for bad employees will simply choose to employ new bad employees.