Define "revenge".
If by that you mean Primary the bastards, great! But good luck. It's extremely difficult to unseat an incumbent (not saying it's impossible).
If he/she doesn't get primaried, then what are you going to do? Personally, I have no qualms voting against the Vichy Republican SOBs - but you'll get the usual screaming bleats from the Stockholm Syndrome GOP sycophants if you try advocating that route. Get rid of one or two or three of them and the tightened sphincters of the remnant will cause a sea change in their attitudes.
It is hard to defeat an incumbent, no question about that. However, I believe that Republican voters are frustrated with broken promises and continual failure to produce. Trump’s earnest actions and making good on his promises stand in stark contrast to their empty talk and resistance. Remember, Trump handily defeated a large field of political pros who were perceived as non-responsive to voter expectations. In the end, the voters trusted Trump more than they did established politicians he was running against.
The anger over Obama is so great that any Republican congressman who doesn’t get behind Trump’s efforts to undo Obama’s destructive policies is going to suffer the wrath of their constituents in two years time. Many of those voters may well decide to support challengers who are vying for the incumbent’s seat.
Watching Trump work feverishly on behalf of voters while many in the GOP play games is pissing off a lot of voters.