Seriously. Ever hear of a party called the Democrats? They went 24 straight years without victory, had only 2 presidents between 1861 & 1933, suffered through two other periods of being in tge opposition, lasting 16 & 12 years respectively. Ya know what? They went on to hold the Presidency for 5 straight terms & dominated 1 house of congress 1955-1981, & the other 1955-1995. "Oh my gosh, we have a bad field! We're gonna die out automatically!"
Yea, but, uh, those parties were no where near incompetent as the current GOP.
Ever hear of the New Deal era? We were nominating fat worse candidates then. Wendell friggin' Wilkie? A guy with no political experience & a former lifelong Democrat? Alf Landon's biggest accomplishment was surviving re-election in 1934. Tom Dewey wasn't ready til 1948 when he'd actually had enough time governing. Hell, the Democrats didn't even run a candidate in 1872. They endorsed someone else! And they still survived. They nominated a known loser not twice, but three times & yet they still survived. Just because things are bad or even horrible doesn't mean a party is doomed.