What are you talking about?
The games are structured very differently; TLOU1 is strictly linear. After the initial flashback completes the story plays out chronologically following a singular set of characters. TLOU2 is split into 3 major chunks, 2 of which occupy overlapping time-frames with liberal usage of flashbacks interspersing the entire story. Moreover there are two sets of playable characters with their own distinct perspectives on the meaning of common events in both the game and its prequel.
This structure is designed to provide narrative counterpoint, but it also makes it more difficult to smoothly control the gameplay flow. Hence significant points are omitted to accommodate better pacing, the most obvious of which is that the details of the (likely arduous and infected laden) journeys between Jackson and Seattle are completely omitted. Basically the stretches most analogous to the first game simply don't exist.
The reason why there are more human enemies than infected is because 80% of the game takes place in Seattle, a warzone contested by two factions who have a kill-on-sight policy. Its all there in the world-building, and as I've pointed out previously allows for a useful contrivance explaining how Ellie and Dina avoid pulling a literal army down on top of them. Latterly it also allows for the Abby sections to have a good mix of human and infected enemies to contend with despite being on ostensibly her own turf.
Basically what ND attempts in TLOU2 is way more ambitious than what they did in the first title, which while very successful and well achieved was comparatively simple. The level of detail and granularity in the design is way up, and that's a good thing in my book because they clearly weren't content to rest on the their laurels and just excrete a carbon copy of the original.
As to the rest of your post, its just stuff I've disproven previously. At no point during regular combat do you kill heavily pregnant women, slowly torture them (just like "heroic" Joel taught you by example) for information, talk with them, bargain with them to save a friend's life, etc.
Hell, Owen even spells this out in his big "I'm done" speech to Abby. He's been fighting and killing Scars for years, but the look he sees in this one guy's eyes is enough to coalesce all his doubts and misgivings about the person he's become into a desire to just walk away in that single moment.
Its just No Mas.