Improvement is a slow process, that involves patience. If you are being more concerned about an online rating? Its going to slow down your improvement.
Set each tactics up on a real board, with real pieces.
Set a time for 3 minutes. If you cant solve it by then, its a pattern you dont know.
Look at the answer to each tactic, and make sure you understand the motif, why their is a tactic, and how the tactic developed.
Whats wrong with online ratings ? How can that slow down my improvement
Which tactics are you meaning ? It's not practical with puzzles here think about the time needed for that.
When it comes to missing easy moves I don't think it's about knowledge. I try to analyze why I missed them and certain themes comes up very often for example
Tunnel vision I forget to think about the whole board or just think about some moves
for example in my last puzzle I got blind for the fact that the pawn could capture the queen
When solving puzzles I experience a problem that hold my rating back. I frequently fail some puzzles that are easy. And by that I mean easy even considering my level a move that I definitely should be able to find. I do solve more difficult puzzles other times. And since that was supposed to be easy a lose a lot of rating points. Here I might mention that my opinion on how easy a puzzle was can differ significantly from what the puzzle rating indicate.
Another aspect of this problem is that often need long time to find the correct move when I find them.
What can I do ? Is it only to continue trying and hope things will loose up eventually ?