The problem is that this outlook turns God into an impersonal “judge” instead of a very personal “Father”.
The Lord’s prayer starts “Our Father…” so this is what God is to us who are His children.
With this in mind let’s look at your questions:
Yes it seems that no matter how hard we try, we remain imperfect. We do things we shouldn’t. A Judge might deal harshly with such things…But how would a loving Father consider important
The failures? or The consistent effort to improve and sincere repentance when we fall?
God Loves us so much that he does not force Himself on us. If we choose not to follow Him…That is our choice. It does not diminish His Love for us.
Of course if we choose not to follow Him, we have no right to grouse about where we end up. Again - it’s our Choice.
Small sins can lead to larger sins. Therefore fighting small temptations can keep us from falling into larger sin by building up our spiritual strength.
God - our Loving Father - allows these things for just this reason…to allow us to grow stronger.
Try to adjust your thinking away from discrete transgression and “judgement” and more toward a process of growth in a relationship…not perfect…but getting better…
Love God and Love neighbor to the best of your ability.
Peace
James