I was only able to see one image. Your bark looks just fine. The branches that are thin and below the canopy get thin and scraggly because the tree itself cuts them off from supplies, water. If a branch doesn't have leaves that are getting enough sun, those leaves and branches get eliminated by the tree itself because they aren't providing enough for their own upkeep. Those leaves make food for the tree's functions, carbohydrates for energy. If a branch has leaves that aren't getting enough light to make enough food to maintain that branch and its leaves, the tree dumps the 'free loaders'...
I do see a major problem at the bottom of your trunk. Soil has been beefed up around the base and you need to get that pulled away from the bark of your tree. Only the top of the root ball should be beneath the soil, nothing, no soil, no weeds, no bark mulch, no rock mulch, no mass moss can be on the bark of a tree. This holds moisture on the bark long enough to promote bacteria and they will girdle your tree by damaging the cambium. Girdling this way is a slow sure death and can be seen sometimes by part of the tree dying.
I'll try to see your other pictures.
I found them...grins.
This is early spring for you correct? Do you see leaf buds that are swollen throughout the canopy of your tree? I can only see a few new leaves...check out that trunk/soil line. I can see where someone has put soil around the bottom of that trunk and you most certainly have a short lived tree if you don't pull that back from the trunk. Looks like only a few inches. Plenty enough to compromise the life of your tree. Pull it back and send a picture of that bark. Please. You contacting us might truly have saved your tree, for reasons you were unaware.