Take it a step farther and vote against anyone with a (D) or (R) next to their name on the ballot.
The current federal government is so far out of step with the populace that a blanket anti-incumbent rule doesn't seem all that bad. The only real question is whether to vote against them in the general election, or just the primaries.
There is a very real possibility that someone else on the ballot is actually worse than the incumbent, which barely seems possible, yet here we are.
A vote "against" without communicating intent doesn't drive recourse in the way you would like.
"X is the most important issue to me this election cycle, and will determine whether I vote for you and donate to your campaign" is clearer and more powerful.
1. Refer to https://www.justicedemocrats.com for a voting guide.
2. Register and participate in local DSA. Sign up here: https://www.dsausa.org