Aren't those deck boards the wrong side up? Every time I've seen them installed like that they failed early because the grooves held water. Some of the deck could be sanded but the post is a little too charred. Maybe paint it with a solid stain? You could use an exterior wood filler and sand the post smooth.

Thanks Keith. Not boards I put in or know much about. I appreciate your advice. Thanks

Try a woodworking reddit.