Dude i don't even know where to begin...ahhh let's see (text wall incoming) first thing first this game is not made for speedrunners so if you want event/wild Pokemon that are tailored for you (as in to be on the same/near to the level of your Pokemon) you're not gonna get them because despite all you said that makes the game easier (it just does) if you want to speedrun Reborn you can do it but don't expect it to be easy/fast, this is not a "normal" Pokemon game where you can finish the entire storyline with just your starter (and 1-2 HM slaves). Now i'll try to answer your (initial) questions (because after that you continue to repeat the same things over and over and...exc):
1) The "night being too dark TM" thing was addressed by many people MANY times and believe it or not it was even darker before, now you can have (minor) difficulties only when there's a thunderstorm at night (and only at the start of the game when you're still not familiar with the city) now after playing 150 hours i can (almost) navigate Reborn with my eyes closed (thunderstorm or not). So this is a problem only for speedrunners.
2) The "too much walking TM" has been addressed too (now i'm going ahead of myself but the majority of your "problems" has been already addressed), this was done to encourage exploration (for secrets and TM's) and because most of the event Pokemon (the relatively good ones at least) appear with certain specific (action or weather) conditions and if you pass an area only one time you'll probably miss them (without a guide of course). Teleport is bugged and led to many problems in the past (some people even considered removing it completely from the game) that's why we don't get it early anymore (i used it only once to get Beldum). Ame said many times that "Fly" will be the last HM we'll get, for the same reasons as Teleport i think (and maybe because it's difficult to implement but idk about that). so again this is a problem only for speedrunners. Ah yes if you don't like the music of the game (or if you find it repetitive) simply don't listen to it (as was said before) problem solved.
3) For the Super Repels thing i really don't care (i use them only when visiting a cave for the 3-4 time after getting all the Pokemon in there), as the original Pokemon games you get them mid game (how it should be) so no issue here. Possible problem for speedrunners maybe?
4) The level curve is...well...normal like in all the other Pokemon games and this is actually the first time i heard someone complain about it so my answer is: there's nothing wrong with it and if you actually have a problem with the level cap then (as someone here already said) that was made to increase the difficulty of the game and can be a problem (again) only for speedrunners. I got to Samson with a team of 6 Pokemon (and 2 reserves) all lv60 without grinding so i don't see where the problem is.
To conclude/reassume your only problem is that you're a speedrunner and you want the game to be easier/faster because reasons and i really don't think that will happen but i'm not the author so idk, this was just my (very mean and offensive) opinion on the matter.
P.S.
Blaziken is really OP and looking at your team it seems to be the only thing that kept you "alive" and progressing so why don't you try with another starter and see how it goes?