TL;DR: I'm not voting for Biden. I will be a spoiler if that's what you call it. The police response to protests is an example of policies Biden wants to keep funding. Biden and Trump can both be bad leaders.

Aside: Voting is entertaining, but work on your cardio. Build some communities. Life is going to get harder for working folk.

I understand the spoiler effect in first-past-the-post voting. Avoiding a voting system subject to the spoiler effect requires a rated voting system. Major reform is required to remove the spoiler effect from the voting system in the USA.

There are other logical problems with the spoiler effect in the USA however.

First, the popular vote is divorced from the Electoral College vote. Thereby, even if Tiger gets 15% of the vote the Electoral College representatives for that portion of the population may vote for Leopard.

Second, there is an assumption Tiger voters would vote for Leopard or Gorilla if Tiger was not an option. Voter turnout in 2020 was 66.8%. That means roughly a third of people chose not to vote. There is an argument to be made that this is also a spoiler, but combined that block could shift the outcome in Tiger's favor.

Third, "I'm not the other guy" is not a political platform. Biden pays lip service to protecting American Democracy which seems to be a conservative stance to maintain a voting system favoring the wealthy. Codifying Roe v. Wade is great, but could have been done at any time in the past. Separation of powers requires a Legislative branch that would work on such issues. Funding the police does not solve policing which leads to responses to protest like the George Floyd marches or recent campus violence.

I am sure there are other reasons to vote for Biden. The FTC fighting corruption under Lina Khan is one. Corporate bailouts opposing the neoliberal order, like CHIPS and Infrastructure, could be another.

I am unable to vote for mass murder. I am unable to vote for corporate bailouts. I am voting for Tiger.