You have 2 different anti-malware programs: malwarebytes (okay to keep) and CleanMyMac - uninstall according to the vendor’s instructions. This program has the potential to be harmful. CleanApp isn’t really useful either.
EtreCheck indicates a runaway process which may be your problem. Open Activity Monitor, select the CPU tab and click on the %CPU column so the list is sorted by highest to lowest. Pay attention to the top 2 or 3 processes running at the top. With a runaway app the top one often remains at the top.
Having identified the top 3 (or top 1 if it is consistently at the top) restart the computer, immediately open Activity Monitor again, and see if the same app is the top CPU user. Just to give you an idea, I have a lot of apps running in the background and my top apps bounce up and down, no single one taking more than 15% before dropping lower and another coming to the top. for the most part, except the occasional spikes, no process is above 10% and are mostly in the 5-6% range.