Welcome @Irenburg I do sympathize with your problems and hope @abhishek solution of re-sourcing the app improves the app launch speed. I agree that boot times are more to do with bragging rights rather than everyday practicality as @Mina implies. You can see below the leap in performance in percentage terms, comparing two notebooks of different vintage regarding chip and drive but - I too am not bothered by the odd 20 seconds – hope you will note how my 13 year old HP G60 HDD Notebook running Trisquel 8.0 gnulinux (based on ubuntu 16.04) compared to your newer machine but still with HDD – being slowed down by ubuntu 20. 
LibreOffice Writer and gimp take about 2secs to launch. Perhaps @abhishek can confirm that ubuntu 20 is indeed slower than 16…? Ah; progress! 
Intel® Core™2 Duo CPU T5800 @ 2.00GHz Hitachi 2.5 inch SATA hard disk drive 
Very slow by today’s standards but I am told that it can be replaced with much faster drive? 
Fast enough for my needs as I also have a much faster more modern Dell Latitude E6420 i7 – 256GB SSD dual boot ubuntu 16.04 with Win10-Pro - though not used hardly at all as this has a smaller screen and no number pad.
Ancient HP-G60-Notebook-PC:~$ systemd-analyze
Startup finished in 11.976s (kernel) + 22.196s (userspace) = 34.173s
Slightly faster than @abhishek Dell XPS Ubuntu edition which uses SSD – 35.704s; explain that please as I have no idea? What about my Dell Latitude speeds listed below….? 
ubuntu 16.04 dell-Latitude-E6420:~$ systemd-analyze
Startup finished in 3.246s (kernel) + 10.378s (userspace) = 13.625s
Ancient HP-G60-Notebook-PC:~$ systemd-analyze blame
7.342s dev-sda1.device
5.630s apparmor.service
3.301s NetworkManager.service
2.558s lvm2-monitor.service
2.181s systemd-tmpfiles-setup-dev.service
1.609s systemd-udevd.service
1.598s accounts-daemon.service
1.572s keyboard-setup.service
1.427s grub-common.service
1.412s lightdm.service
1.258s systemd-journald.service
1.221s wpa_supplicant.service
1.220s systemd-modules-load.service
1.105s usb_modeswitch@2-1.service
982ms console-setup.service
846ms avahi-daemon.service
805ms home.mount
801ms ofono.service
706ms resolvconf.service
686ms rsyslog.service
677ms console-kit-log-system-start.service
668ms systemd-random-seed.service
619ms systemd-logind.service
dell-Latitude-E6420:~$ systemd-analyze blame
5.660s NetworkManager-wait-online.service
3.039s apt-daily.service
1.729s fwupd.service
781ms dev-sda5.device
630ms networking.service
617ms vboxdrv.service
548ms apt-daily-upgrade.service
399ms snapd.service
380ms apparmor.service
325ms dev-loop0.device
320ms grub-common.service
318ms dev-loop1.device
300ms irqbalance.service
229ms ModemManager.service
223ms ondemand.service
222ms apport.service
212ms speech-dispatcher.service
183ms accounts-daemon.service
178ms lightdm.service
130ms alsa-restore.service
116ms NetworkManager.service
106ms console-setup.service
102ms gpu-manager.service
Academic interesting nitty-gritty stuff 
– Hope @abhishek will include the involvement of the dreaded google and that backdoor in his write up on Snap…?