First off, we entered a recession in February of 2020, so there was something else going wrong. How bad that recession would have been without Covid is anyone's guess, but it would have happened with or without Covid. Then there was the extremely odd Repo market failures in 2019, where almost all the major corporations in America ran out of cash-on-hand at the same time. That is not a good economy, but honestly no one is quite sure where the failure was there. Finally, there was the oil market failure, where oil prices went negative. This has forced the oil industry to payback investors, a damage to the market that will go on for generations.
trump definitely caused the oil market failure, and probably caused the Repo market failure. It is reasonable to blame him for the underlying recession, the recession that would have happened without Covid. trump is not responsible for Covid, but is responsible for the response to Covid. If you think his response was great, he deserves the credit, but if you do not think his response was very good...