Is there "Progression" in Evolutionary Theory

What I'd read and learned was; natural selection, the mechanism of evolution, "can lead to increased complexity, lead to decreased complexity, go round in circle, back-track,and keep things just the same." The thing is that evolution will go in every direction in wich organisms get adapt to their biotic and abiotic enviroment.
Some bacteria and viruses don't have complex dna/rna error checking or repair system and that fact accerlate their evolution in order to adapt with their severe and always changing environment. for example, Hepatitis b bacterias don't have such mechanism, so they become drug resistant.So, lees complexity, right?There are also some kind of lizard;yellow-who sneak mating from orange, orange-bully mating from blue , blue-can defeat against yellow.So., kind of seissors, stone, paper; go round in circle.
Besides, our environment is not static.So, selection is not goal oriented.
My professor used to say the famous quote:" All organisms of nowadays are survival machines of 3 billion years of evolution."
Best of all,
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