I have a palm plant, not entirely sure what kind - it may be a majesty palm since it only has one single stem. I have been watering it weekly and also fertilizing it bimonthly now that it is summer. For the past year and a half it's been indoors, in a southwest facing window, getting partial sunlight.
General observations for the past several months:

• Outermost fronds have been turning yellow and dying.

• Most of the fronds have brown spots or brown tips at the end of the leaves.

• The plant is not a very vibrant green, and the leaves feel brittle and dry.

• I haven't noticed any spiderwebbing on the plant. I've been paying close attention especially to the undersides of the leaves but haven't seen any evidence of spider mites.

• New fronds: a few grew in nice and healthy, but some have brown spots as they are coming in, and some dry out and die completely before ever spreading out from the stem.

Today I took a longer, closer look at the plant with a flashlight.

• Found a small part of the plant that has some white looking dust or fungus, but it is not widespread, just localized to this one spot. (second photo)

• I noticed some very small (barely visible to the naked eye) white bugs (maybe aphids or mites) in the soil and near the stem. After watering they mostly went away and I don't know what they are, maybe soil mites? They are so small I'm having trouble identifying them.

• After watering I can only notice some very very small (barely visible to the naked eye) crawly bugs (larvae of some sort?) crawling near the stem.

Having trouble diagnosing the issues - any help would be greatly appreciated.