Hmm, I’m not experiencing that. Could Android (well, the flavour used by your phone) be killing background apps too aggressively or something like that?
Edit: could also be a RAM thing. I have 12GB.
You can get 32GB of laptop RAM for like $60 to $80 if you find sales, and even one 16GB stick would be an upgrade for you. Modern bloat is so bad that having 8 gigs of RAM is the equivalent of having 4 a few years ago.