Coping with defeat
(Tl;dr down below)
Hello. I have decided to start this thread after taking a long time to think this through, but I am clueless, so I turn to you for help.
I have been a fairly active player since May 2015 with few short breaks (2 months the longest). I have had my ups and downs, tried a higher alliance (Gold 2 at the time, which was around Season 1-3), then retired and stayed in a low-end alliance where I can chill.
I have been focusing on solo content, bcs I don't enjoy AW/AQ. I explored Act 1-5, went through Act 6 without much trouble (1700 units for GM quest, with 200 for Angela mini due to my missing counter) and I also had a blast in Act 7. Eventually I managed to reach Thronebreaker and rn I am sitting on 5 r3 champs, 2 generic 2-3 gems (still deciding whom to give them) and a 6* roster of my dreams, because my luck has been just unimaginably good. I have also completed all Variants from 4 up.
However, now I am defeated. No matter what I do, no matter how hard I try, I just can't get any further. I'm stuck. I tried exploring Variant 6, I tried exploring 7.1 but I failed repeatedly at both. The sole reason for that is lack of skill on my side. I got the champs for the content, even at high enough ranks. I just can't control them good enough and I don't get much better at the game.
If I were to list my skills, I'd say: parry (pretty good, rarely fail at it), dex (okay level, can dex quite a few SPs), reparry (still improving the timing tho) and dash intercept. I know about stuff like light intercepting, but I haven't been able to learn it despite my efforts.
I think the issue is, that even tho I understand the endgame nodes and can find/bring the right counter, I don't manage to execute the necessary strategy, because I make mistakes and you know how deadly they are. A prime example of that is EoP Bishop who cost me 20 revives just because of my sheer stupidity and mistakes like dying from his SP. Same story for Act 7.
Another (and hopefully last) issue I see is, that I don't have enough patience to practise the lanes. 7.1 costs a lot of energy and if the problematic fight is 4th on the path, retrying 4-5x means 12 hours worth of energy. Fine, that's on me. It is my decision to rather use a revive or two rather than practise one fight for a day. And sure, there is no shame in reviving. But since I am f2p, every single revive leaves a noticeable dent in my unit stash. If there is one thing I dislike about the system, it's the cost of revives. But it is what it is and works good for years. It's like...my opinion, man. Don't change what works fine.
And that all brings me to the very point of this: how do I cope with the fact that I am not good enough to progress further? I'd love to, I still try despite numerous defeats, but I end up beaten, tired and depressed, because I see the mistake is in myself only. I see that I just don't have it in me to get better. Which leaves me two options: stay low and get meaningless rewards from easy content, or aim for higher rewards, but with a fair certainity of failing. So how do you get to peace with the fact that you reached your personal limits? Both ig and irl, I am very curious. Any advice you can give is highly appreciated. I love the game and Marvel comics, so I wanna play it, so just please don't tell me to quit. I tried that but I always boomerang back.
Tl;dr: I got stuck, I lack skill. I am very sad. Fail to improve my skills. How do I accept that I suck?