Realtek RTL8822BE Adapter bad wi-fi internet connection problem solved (Hp Envy x360 laptop 2020)
Solution: just make sure your wi-fi connection is 5 Ghz.
My laptop: HP Envy x360
Old router model: Tp-link TL-wr741nd
New router model: Tp-link Archer c50 (cost apprx. 30 $) but you can use other dual band (2.4 and 5 Ghz) router, it should help.
Frustrating :) Wi-fi adapter model: Realtek RTL8822BE 802.11ac PCIe Adapter
Good luck!