You forgot one of their biggest and likely to be successful long term plans: import a bunch of illegals and work on letting them vote/them having children that become citizens. Those plans are 18 years out. But they've let millions in, who will each have multiple kids, who will likely vote democrat..
Then they make the military toxic as all fuck to the people who normally join, with conflicts right around the corner. Next they'll be recruiting illegals with the offer of citizenship, and the right will support it because of their naive morality. "Well If they serve the country I guess they deserve citizenship. Service guarantees citizenship! We need to recruit people really badly anyways!"
Then there's them taking over the educational system and other institutions. Using that to indoctrinate children. That's at least a 12 year plan per child, but it's something that's been happening for DECADES.
The biggest mistake the right makes, is underestimating the left and assuming their malice is incompetence. No, they're malicious, not incompetent. It's hard to see a lot of what they do as anything but incompetence, because it's hard to fathom that they're TRYING to wreck the country. So right wingers who can't put themselves in their shoes assume it's all incompetence.
And you're right. Trump threw a wrench in their plans, and they got stupid. They can't wrap their head around Trump and his popularity. But at this point I'm not going to be surprised if they sentence him to prison on July 11th and he meets unfortunate ends while in there. I would hate to see the guards take a nap while the cameras fail, and he kills himself or something. Nothing like that has ever happened before!
And they killed like 100 million people.