Western Redbud not growing. Should it be replaced?

Hi,

Planted western redbud two years ago and has only grown one and a half inches.

Socal coastal morning sun afternoon shade. One of the first natives I planted maybe because idk wtf I was doing i didnt set it up for success?

Also, was reading that planting a single stemmed one may not grow as fast. Thinking back seemed to be a lazy and fast job just one stick for the whole plant.

Heard they aren't good near the coast but have seen plenty closer to coast far bigger than my little one.

When is it time to throw in the towel and plant something else instead?

Even my howard mcminn growing far faster in similar conditions. Its about 5x bigger planted around same time.

Thank ya'll for your expertise 😊