I purchased a Doogee S88 Pro a while ago, but I haven't used it because if concerns of malware / adware being preinsalled on the device or being added later by updates. The issue is I love the phone. The design, battery everything about it appeals to me due to working outdoors.
However, I can't for the life of me find out whether I can root it and install custom ROM so I wouldn't have to worry about malware anymore.
unofficialtwrp.com
Is the above link legit? If so TWRP can be installed and therefore a custom ROM?
However, I can't for the life of me find out whether I can root it and install custom ROM so I wouldn't have to worry about malware anymore.

unofficial twrp 3.4.0 for Doogee S88 Pro - unofficial twrp
Download unofficial twrp 3.4.0 root Doogee S88 Pro, user who own Doogee S88 Pro can root it by following the below instructions

Is the above link legit? If so TWRP can be installed and therefore a custom ROM?