If you spent 1k energy on Golem and didn't get the first reward, you should look up Energy to Points ratios for event. For example, on Turn Attack events, I run them on Stage 8 because its the highest points to energy I can do since I don't have a team that does low-turns on stage 20+. You might be running Hard 4 or something, when you should be doing 16 or 20 Normal.
For the last 3 points you were trying to make, I do not understand what you're talking about. Everything is within reach if you can do Demon Lord on Ultra Nightmare. Even moreso with Ultra Nightmare (2-3key) AND Nightmare (1 key). THAT is the content you need to focus if you're not able to do it. You will average 6+ Sacreds per month, 12 Voids and about 30 Ancients if you clan is killing both so you get 2 chests.
The ONLY Champions you can't pull from those shards are either ones you get for free anyway OR daily login champs (and I still think Primals should be able to pull past ones but that's another story).
Since I started doing UNM/NM Daily in December, I've pulled a 2nd Gnut, 2 Pythions and a Brogni. All great Fusion champions AND Fusions I did so they are duplicates I'm grateful to have. The point being tho, you don't *have* to do a Fusion to get the Leggo from it. Especially since I'm not sure there's ever been a Void Leggo Fusion?
So yeah, 6 months to get Scyl is a long time, but you can be doing NM in 6 Months and probably UNM if you look up strategies. Lots of CCs do "F2P New Account" at the start of the year and you can see how far they get.
Now what it seems like you don't understand is there is Progression and you do need to put work in, daily, to get your account to a place where everything I wrote above is attainable. What I'm reading (and apologies if I'm wrong) is that You feel you should have a End-Game Account within the first 3 months of playing, is that right? Because that sounds awful, this is really a game to play with friends and I'd hate to put 3 months of work into a game that I'm then "Done" with or bored with *IF* its a Progression-Based game. That's the key thing I hope you understand is the Progression should take a while.
Final Thought on this is that since I started playing in May of 2022, here's who Raid gave me for free randomly: Ronda, Artak, Wukong, Ultimate Death Knight and Deliana (maybe one more i'm forgetting). Most of those are AMAZING on their own, but God Tier for New Players. Oh and don't forget about New Player Promo Codes that guarantee you a decent/great Epic.