Maybe giving you just a little of the above at a time will help. We will start with some conclusions by those very qualified to give them:
Nobel Prize laureate Harold C. Urey once stated:
"All of us who study the origin of life find that the more we look into it, the more we feel it is too complex to have evolved anywhere. We all believe as an article of faith that life evolved from dead matter on this planet. It is just that its complexity is so great, it is hard for us to imagine that it did."
F. Dyson, 'Origins of Life' (1985, Cambridge University Press, p. 31): "The Oparin picture was generally accepted by biologists for half a century. It was popular not because there was any evidence to support it, but rather because it seemed to be the only alternative to biblical creationism."
Yet Dyson admits, and many other evolutionary scientists were fully aware, even in the 1950's and 1960's, that these experiments were not solutions to abiogenesis but rather magnified the problems with any notion of abiogenesis.
Evolutionist A. Cairns-Smith, "Genetic Takeover and the Mineral Origins of Life" 1986. Points out that experiments like Miller-Urey demonstrate that critical prevital nucleic acids are highly implausible:
"But so powerful has been the effect of Miller's experiment on the scientific imagination that to read some of the literature on the origin of life (including many elementary texts) you might think that it had been well demonstrated that nucleotides were probable constituents of a primordial soup and hence the prevital nucleic acid replication was a plausible speculation based on the results of the experiments. There have indeed been many interesting and detailed experiments in this area. But the importance of this work lies, in my mind, not in demonstrating how nucleotides could have formed on the primitive Earth, but in PRECISELY THE OPPOSITE: these experiments allow us to see, in much greater detail than would otherwise been possible, just why prevital nucleic acids are highly implausible." [emphasis mine].
R. Shapiro, Ph.D. Chemistry, "The Improbability of Pre-biotic Nucleic Acid Synthesis" 14 Origin of Life 565, 1984, relates how experiments like Miller-Urey have very limited significance because of the implausible conditions under which they are conducted: "Many accounts of the origin of life assume the spontaneous synthesis of a self replicating nucleic acid could take place readily. However, these procedures use pure starting materials, afford poor yields, and are run under conditions that are not compatible with one another. Any nucleic acid components that were formed in the primitive earth would tend to hydrolyze by a number of pathways. Their polarization would be inhibited by the presence of vast numbers of related substances which would react preferentially with them."
Speaking as an evolutionist, and therefore, a an apriority believer in abiogenesis, Klaus Dose, Interdisciplinary Science Reviews, 1988, 13(4) 348.
writes:
"More than 30 years of experimentation on the origin of life in the fields of chemical and molecular evolution have led to a better perception of the immensity of the problem of the origin of life on Earth rather than to its solution. At present all discussions on principal theories and experiments in the field either end in a stalemate or in a confession of ignorance."
"Considerable disagreements between scientists have arisen about detailed evolutionary steps. The problem is that the principal evolutionary processes from pre-biotic molecules to pregenotes have not been proven by experimentation and the environmental conditions under which these processes occurred are not known. Moreover, we do not actually know where the genetic information of all living cells actually originates, how the first replicable polynucleotides (nucleic acids) evolved, or how the extremely complex structure function relationships in modern cells came into existence."