I don't like how the Coil battle was handled

Now, it's been quite a while since I've read the relevant chapters - so you'll have to excuse my memory. (Took a long break, Now I am reading Arc 18). But the reason I didn't like it was that I felt it was building up to something much bigger scaled, before the author realized the protagonists don't have a realistic chance if they are actually fighting this guy head on with the resources he has.

Let me mention what I liked first. I liked how Taylor, besides all odds, managed to escape from like an army after being thrown into a hell-hole. Did not expect her to make out on her own at all. Peak cinema.

But then they beat Coil by just, tricking him to split off after a small word game - and Lisa happens to have bought off all the soldiers? I think I am remembering the gist of it correctly. Like, come on. You have this super villain ex-army guy, with a LAIR. Whose power synergizes so well with Dina that all he has to do is command soldiers from his room and it would make an interesting fight. And he would even fight himself if it came down to it, using any trick in the book and fighting unfair. Now, how are the Undersiders meant to take him on in a fair battle like that? I have no clue. But it honestly was the scale I was expecting as soon as I had heard of his bunker/lair/whatever.

It's not that it's a big issue for me or anything, it's just that this series had kept delivering each time and it was the first time I felt iffy with a conclusion. Love this story.