Ok, so let's skip the whole thing about you not wanting to be interested in guilds... And look at this... As a F2P or lower tier player you can contribute 600 guild points per day pretty easily that puts you at max so you are even with all Pay2Play/Big players and everyone is even Next the daily challenges GW, PvP, & Challenges are pretty much equal for all players and LS, DS, Cantina, HM might have a slight advantage to whales, but the spread between Rank #1 and let's say #20 or even #50 is so small it's really is pretty even (honestly i think this part isn't skewed enough for #1 to #50) Finally you have the raids and gear from raids it ranks based on damage and I assume this is where you are frustrated because honestly the rest is perfectly even between all players... 5 Chances a Day with Characters, so the max you really would use would be 25 characters... If you have 25 characters level 70-80 with Gear XIII you are probably going to be the in the top of the group and you will be getting drops for Gear 9+, If you have 5-7 characters level 70-80 with Gear XIII you might get top 20% on a raid occasionally and get premium gear boost one of those heroes to Gear IX+ but it won't happen every raid, however you will regularly get purple gear to start building up other heroes ... so you will get that 25 hero base that will help you more regularly get "premium gear"... and if you don't have 5-7 characters to level 70-80 Gear XIII you need to get purple gear for them so the drops you will be getting are good for you, and you don't need to hoard premium gear while you wait to build guys up to use it ... one it is unfair, and two no game works that way just like how you can't get purple gear on Tier 1 battles ...
So really the guilds only hurt one kind of player which is a player who has 5 characters 7* level 80 Gear XIII, but doesn't have any other character leveled at all... Which if that is the case you are playing the same 5 heroes every PvP every Galactic War every Cantina Battle etc... there is no strategy in your hero selection no variety in your play... so guilds now encourage those players to "try and invest in new characters" which i think is a good thing... and even if you hate that you can still buy certain premium gear in the guild store with enough guild credits so you don't even have to get them on drops...I mean every RPG works like this you don't get "final level stuff without the grind"... I am so confused and where your frustration is ... what would you change what would you suggest?

Sidenote: I agree there is a difference between not being able to obtain one character and not being able to upgrade gear for "several", but if you don't like the Dark Side Battles you can't upgrade certain characters gear without playing them... or if you don't like the cantina battles you can not (reliably) upgrade characters attacks without them, I just don't see where your beef is please explain your problem and how you would fix it if you were them?