Pungyouknow

Just started playing a week or two ago and I'm finding it exceptionally difficult to both be at a substantial level to beat the upcoming gym battles and also to have Pokémon that aren't complete garbage unless they have good maxed IVs. I would say overall I really enjoy the changes to ai but there are a few things that have really started grinding my gears like for instance why does every trainer Pokémon have to have coverage? I like set mode so I can try and outsmart and tactically challenge the ai but when every Pokémon has a typing move that counters my switches it's very difficult to play the game without wasting thousands of pokeyen on healing items. I guess I'm looking for advise as much as I'm trying to raise a point for new players in that yes I can see the elitism and can appreciate that part but I don't want to play for that I literally just wanted to play some Pokémon catch a few and take them through the journey but now I'm sitting in one spot where I have to find two perfect IVs and above average on the other stats before even thinking I can try to challenge the gym. I don't even get to catch the Pokémon I want I'm basically forced to only pick super good Pokémon and even then they're basically useless unless I have a team strategy in place. I'm already getting bored honestly, if I have to completely counter every gym before even attempting it increasing my grinding time from none to hours then it's just not worth it like what am I grinding for? If there was a single raid at the end or anything to look forward to other than competitive PvP I'd get it completely but I've played for 60 hours already and not even got a pokemon to level 40 across 3 regions thinking every time I try a new one I'd have a better team better chances but no. Every trainer has coverage. Every battle I have to go back to the Pokémon centre and every gym battle I'm spending tens of thousands of pokeyen just to scrape by even with good Pokémon good coverage and typings that in any base game would flatten the gym battles without taking a single point of damage. What's the best Pokémon to invest in to sweep the game? I feel like I'd get on much better with the entire experience if I wasn't getting my ass handed to me every battle.