Mandarin orange

Here is my mandarin orange tree a treat to myself from (father in law)

This clearly does not look as it should the leaves are too yellow with the dark green veins. The leaves should be all dark green.

I brought specialist citrus potting compost and am feeding the correct summer feed possibly I am over watering I must leave this alone think this is going to be a problem. There are some tiny mandarins.

I have removed most of the fruit as have read this is better for the plant in the early few years. I am going to keep fingers crossed with this plant and try and leave to its own devices.