omnia tum demum odi -- Then at last, I hate all things (rather emphatically having expected this outcome for some time)
omnia denique odi -- And at last, I hate all things
omnia tandem odi -- In the end, I hate all things
omnia aliquando odi -- Finally, I hate all things (probably not the best option, since aliquando can also mean 'sometimes', 'henceforth', 'previously', et cetera)
omnia = Nominative plural neuter substantive adjective of the third declension (omnis, omne). If you want to change the meaning to 'everybody', then omnia becomes omnes.
odi = This is a defective verb, having only forms of the perfect active system, yet having means of only the present active system.
tum demum, denique, tandem, aliquando = Adverbs; these are the tricky part. I could write pages and pages on the subtle differences between them, and the evolution of their usages and how one may be more appropriate than another from a certain context, but I doubt anyone cares. I personally prefer the sentences using tum demum and denique, although the former is a more recent (relatively speaking) construction, and the latter is a bit of a departure from denique's more recognizable usage in enumerating points of argument.
If you legitimately need help, yes.