How to optimize the loading of external scripts in Google Tag manager on the site?

Question

Bitrix24

Hello everyone, can anyone tell me how we can improve the site loading performance, we have more than 40 events in the Google tag manager, metrics, pixels, analytics, call tracking, bitrix and more), all this affects the loading of the site (everything loads very slowly), caching plugins do not help much, somewhere we read an article about introducing a tag with a script in GTM, according to Google Page speed, the indicators became better, but in fact everything is very slow, especially the mobile version loads, we remove Gtm, everything is fine ..
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Answer 1

copy from the leaders, if the proger is stupid - change the proger