For example Obama came in on day one and had high unemployment rate, Trump came in and had low unemployment rate. Are you suggesting Trump was better than Obama because the simple statistic of the unemployment rate on day one was better for Trump than Obama?
Another, non-cherry picked statistics is that for post WW2 presidents, all Democratic presidents, except one, have had LOWER unemployment when they left office than when they started. Carter had the same level. All Republican presidents, except one, have had HIGHER unemployment when they left office than when they started. Reagan had lower unemployment.
This is far more suggestive or what was going in the presidencies, because things had to happen for their rate to be lower.
Obama's unemployment rise started in April 2008 with a rising trend starting a year before that. How's that a reflection of Obama? It isn't. Obama got in, and within 10 months unemployment went up to 10%. No president can change an economy quickly, especially one which has crashed.
So, yes, Obama has high unemployment rates for the first five or six years of his presidency, but any other president would have had the same had they won that election.
You need to understand the context, statistics can provide some information, but NEVER show the whole picture.