Actually, no one is quite sure what Trump believes (“America First” or for a strong national defense and support of allies; against all immigration or only against illegals and concerned primarily on impact on employment for American citizens, for or against big government, and for or against states’ rights, etc.). What annoys people about Trump is not his policies, but his rude behavior, which is contrary to how presidents were expected to act (consider the conservative Reagan routinely meeting with the liberal Speaker of the House, and drinking together) Biden is just as confusing and inconsistent on policy as Trump (pro or anti-WOKE, pro-Israel and pro-Ukraine or trying to make sure neither does more than barely survive, pro-working class on tax or wanting to repeal the caps on state taxes and mortgages for the top 10%,etc.), and like Trump, Biden is highly partisan and often insulting.
Both have conventions and platforms coming up, and will be forced to take positions. It will be interesting.