Progress is always slower at the start of a new field. Look at early science, music, art, sports like boxing where we have film or records in sports like track and field -- at the beginning what was done looks like 'garbage' compared to what we have now. But without the efforts (and often genius) of the first guys the field never progresses at all.
There's a tendency to think what is now simple and basic was always obvious and so anyone could have come up with it, to forget that our technology and skills are built upon what others discovered before, and that what seems primitive and unskilled by today's standards was in its day the result of a lot of effort and creativity. Often the hardest part is getting something to work in the first place -- subsequent refinements are typically much more efficient, but they're based on someone coming up with the idea in the first place.
Or to use the analogy that earned me the title of biggest moron of the millennium, F=ma is pretty obvious to any high school student today, and advancements on it since Newton's day (Lagrangian and Hamiltonian mechanics for instance) are far more sophisticated and powerful. But Lagrange and Hamilton both stated how much they owed to Newton's original insight, and its because of those original insights that Newton is considered one of the two greatest physicists every, even though the techniques he invented are 'garbage' compared to modern techniques.