I'm a painter, and your instinct is right. The art establishment has no clothes. Look into "The Twilight of Painting". It's expensive but worthwhile.

There are well-intentioned people here explaining to you why your natural instincts are wrong because they have learned how to carefully tamp theirs down. Picasso and other modernists were an important step forward, but the ideas were taken too far. Twombly is a hack, full-stop.